We make chalk right here in Aurora, IL. Not only is it made in the US, but we feel it’s the best chalk made anywhere in the world. Most of our chalk reels are made here as well. From molding the components, assembling the parts, and testing the reels, if you are holding a Keson chalk reel in your hand, you’ve got your hand on one of the best tools out there.
Our twine, paint, barricade tape, and surveyor flags help finish up any layout job.
Keson LLC is a professional measuring and marking tools manufacturer specializing in measuring wheels, tape measures, chalk lines, construction levels, and marking paint for contractors and tradespeople. Founded in 1968 by Roy Nosek and now led by third-generation family ownership, this Aurora, Illinois-based company proudly manufactures its products in the USA, including being America's only marking chalk made in USA producer. From pioneering fiberglass measuring tapes to developing innovative Kesonite professional grade measuring wheels and precision steel tape measures, Keson delivers construction measuring equipment engineered for demanding job sites. The company's 500+ SKU catalog encompasses surveying measuring wheels like the bestselling RoadRunner series, ProChalk construction marking supplies with five permanence levels, Ultra-Mark inverted spray paint, and SOLA-partnered professional construction levels featuring patented FOCUS vial technology. Distributed exclusively through authorized dealers across North America, Keson contractor measuring tools combine traditional craftsmanship with modern innovation, following founder Roy Nosek's principle: "If a job is worth doing, it's worth doing right." Whether professionals need long tape measures for construction projects, pocket tape measures for contractors, durable chalk line reels, or precision professional marking tools for surveying, Keson's made in USA tools deliver uncompromising accuracy and durability backed by limited lifetime warranties and five decades of American manufacturing excellence in construction measuring and marking equipment.
| Name | Role |
|---|---|
| Roy Nosek | Founder (1968) |
| Nosek Family | Third Generation Owners (Keson) |
| Scheyer Family | Third Generation Owners (SOLA) |
| Name | Job Title | Description |
|---|---|---|
| Aaron Nosek | President & Chief Executive Officer | Leading the company's strategic direction and operations |
| Jude Nosek | Marketing Director | Overseeing marketing strategy and brand development |
| Sarah Durbin | Customer Service | Head of Customer Service |
| Dave Nosek | Human Resources | Head of Human Resources |
| Product Category | Sub-Category | Description |
|---|---|---|
| Chalk Line Reels | Giant String Chalk Line Reels | Keson's Giant chalk line reels represent the industry's most innovative approach to high-capacity chalk marking, manufactured in Aurora, Illinois. These revolutionary reels hold an astounding 24-27 ounces of chalk—up to ten times more capacity than conventional chalk boxes—dramatically reducing refill frequency and maximizing productivity on large-scale projects. The massive capacity means crews can snap hundreds of lines per fill, making them indispensable for roofing, concrete forming, siding installation, and any application requiring extensive layout work. Keson molds the plastic components, assembles every reel, and tests each unit at their Aurora facility, ensuring American manufacturing quality. The BigMouth grommet fill opening matches standard chalk bottle sizes perfectly, allowing quick, mess-free refills. With 3X gear ratios for rapid line retrieval and rugged construction that withstands job site abuse, Giant reels embody Keson's commitment to solving real-world contractor challenges through intelligent engineering. |
| Bold String Chalk Line Reels | Keson's Bold Line chalk reels are engineered for professionals who need highly visible layout lines that command attention on busy job sites. These specialized reels utilize thicker, twisted cotton string that picks up and deposits substantially more chalk than standard lines, creating bold, vivid marks that remain visible despite foot traffic, weather, or distance viewing. The increased chalk deposition is perfect for exterior applications, concrete work, and situations where layout lines must remain visible throughout multi-day projects or in challenging lighting conditions. Bold Line reels feature Keson's precision manufacturing quality with robust gear trains, ergonomic handles, and the company's signature BigMouth fill system. The generous chalk capacity ensures bold lines can be maintained throughout the workday without constant refilling. These reels are particularly valued by concrete contractors, framing crews, and masonry professionals who depend on clearly visible reference lines for accuracy and safety. | |
| Standard String Chalk Line Reels | Keson's Standard Line chalk reels deliver professional-grade performance in the most popular format that has served contractors reliably for generations. These workhorse reels balance chalk capacity, line quality, and portability perfectly, with 3-3.5 ounce capacity that provides ample chalk for full workdays without excessive weight or bulk. The standard twisted cotton line strikes the ideal balance between chalk retention and line clarity, laying down crisp, visible marks without excessive ghosting or overspray. Made in America at Keson's Aurora facility, these reels feature precision-engineered gear mechanisms available in both 1X standard rewind and 3X high-speed options. The durable polycarbonate or metal housings withstand years of job site punishment, while the ergonomic design ensures comfortable operation during repetitive layout work. Hook mechanisms are engineered for secure attachment and quick release. These reels represent the backbone of Keson's chalk line offerings—reliable, efficient tools that professionals trust day after day for accurate layout work across all construction trades. | |
| Precision String Chalk Line Reels | Keson's Precision Line chalk reels are engineered for finish work and applications where fine, controlled chalk deposition is paramount. These specialized reels feature braided synthetic polyester line that deposits minimal chalk while creating sharp, precise marks ideal for interior layouts, finish carpentry, and detailed work where excessive chalk would create cleanup challenges or appearance issues. The braided construction prevents line fraying and maintains consistent diameter throughout the string's life, ensuring uniform chalk deposition. Synthetic material resists moisture, mildew, and stretching, providing superior longevity compared to natural fiber alternatives. The controlled chalk deposition reduces ghosting—faint shadow lines that can appear adjacent to primary marks—resulting in cleaner layouts that are easier to interpret and less likely to cause confusion. These precision tools are manufactured with the same Aurora-made quality as all Keson chalk reels, featuring smooth-operating gear mechanisms and durable housings. They're the choice of discriminating professionals including cabinet installers, tile setters, and finish carpenters who demand crisp, clean layout lines. | |
| Marking Chalk | ProChalk Standard | Keson's ProChalk Standard marking chalk is manufactured entirely in Aurora, Illinois, making Keson America's only domestic marking chalk producer—a distinction the company takes immense pride in maintaining. This fundamental formula represents permanence rank 1 in Keson's five-tier system, designed for applications requiring temporary to semi-temporary lines that clean easily without staining. Available in classic blue and white, Standard chalk is ideal for interior layout work, roofing, siding installation, and paneling where marks need to remain visible during construction but remove cleanly afterward. The precisely formulated pigment-to-carrier ratio ensures consistent performance batch after batch, a hallmark of Keson's quality control. The fine powder texture flows smoothly from chalk bottles and coats chalk line string evenly, preventing clumping or clogging. Standard chalk adheres firmly to strings until contact with marking surfaces, then releases cleanly to create sharp, visible lines. This versatile chalk serves as the foundational marking material for general contractors, framers, and trades requiring reliable temporary marking that won't create permanent staining on finished surfaces. |
| ProChalk High Visibility | Keson's ProChalk High Visibility marking chalk delivers maximum visual impact through intensely pigmented fluorescent colors that command attention even at long distances or in challenging lighting conditions. Available in brilliant lime, safety orange, and fluorescent yellow, this permanence rank 2 chalk is specifically formulated for exterior applications where lines must remain visible despite sun glare, shadows, or cluttered work environments. The heightened pigment concentration creates lines that practically glow, making them ideal for corrections, plumbing layouts, electrical rough-in work, roofing projects, and masonry applications. High Visibility chalk maintains Keson's fine powder consistency for smooth application and even string coating, while the enhanced pigmentation ensures marks remain clearly visible longer than standard formulas. The bright colors serve dual purposes—improving accuracy by enhancing line visibility and promoting safety by making layout marks obvious to all workers. Made in the USA with Keson's rigorous quality standards, this chalk represents the company's understanding that different job site conditions demand specialized marking solutions. It's the go-to choice when visibility cannot be compromised. | |
| ProChalk Semi-Permanent Chalk | Keson's ProChalk Semi-Permanent marking chalk represents permanence rank 3, engineered for exterior applications requiring marks that withstand weather, moisture, and moderate traffic while remaining visible throughout extended project timelines. Available in black, red, and other robust colors, this advanced formula bonds more tenaciously to surfaces than standard or high-visibility chalks, making it ideal for exterior layout work, concrete forming, roofing projects in changeable weather, and metal fabrication. The enhanced permanence comes from carefully calibrated pigment chemistry that resists washing away in rain or fading from UV exposure, ensuring reference lines remain usable for days or weeks rather than hours. This durability is critical for projects where layout occurs significantly before construction, or where work spans multiple weather events. Semi-Permanent chalk still allows eventual cleanup with appropriate methods, distinguishing it from permanent formulations. Manufactured in America with Keson's exacting standards, this chalk solves the frustrating problem of disappeared layout lines, reducing rework and improving accuracy. It's essential for concrete contractors, steel erectors, and commercial roofing professionals who need layout marks that endure job site realities. | |
| ProChalk Permanent Chalk | Keson's ProChalk Permanent marking chalk achieves permanence rank 4, formulated for extreme conditions and long-term applications where layout marks must endure indefinitely against weather, abrasion, and chemical exposure. Available in black, blue, and red, this tenacious chalk creates marks that resist virtually all environmental challenges, making it essential for exterior concrete layout, foundations, roadway marking, structural steel fabrication, and applications where layout lines must remain visible from project inception through completion—potentially spanning months or even years. The advanced pigment formulation chemically bonds with porous surfaces, creating marks that won't wash away in heavy rain, fade from prolonged sun exposure, or disappear under foot traffic. This permanence makes layout verification possible throughout construction, ensuring accuracy isn't compromised by lost reference marks. Made in the USA with Keson's legendary quality control, Permanent chalk represents the ultimate marking solution when line longevity is non-negotiable. Civil engineers, concrete contractors, and infrastructure professionals rely on this chalk for critical layout work where accuracy and mark retention directly impact structural integrity and project success. | |
| ProChalk Ultimate Dye | Keson's ProChalk Ultimate Dye represents permanence rank 5—the absolute pinnacle of marking permanence, utilizing true dye chemistry rather than pigment suspension to create marks that are virtually indelible. Available in black, blue, and red, Ultimate Dye is engineered for the most demanding exterior applications where marks must survive extreme weather, continuous UV exposure, chemical contact, and heavy traffic while maintaining visibility indefinitely. This isn't chalk in the traditional sense but rather a sophisticated dye formulation that penetrates porous surfaces and creates molecular-level color bonds that cannot wash away, fade, or wear off under normal conditions. Ultimate Dye is essential for long-term exterior layouts, concrete projects spanning multiple seasons, infrastructure work requiring permanent reference marks, and any application where layout accuracy must be verifiable years after initial marking. Made in America with Keson's uncompromising standards, this premium marking material costs more than standard chalk but delivers unparalleled marking longevity. Civil engineers, DOT contractors, and commercial developers specify Ultimate Dye when project scope, timeline, or legal requirements demand permanent, traceable layout documentation. | |
| Mason Twine | Twisted Mason Twine | Keson's Twisted Mason Twine is a time-tested construction staple, manufactured using traditional twisting methods that create strong, economical line perfect for masonry layout, bricklaying guides, and general construction marking needs. The twisted construction provides excellent tensile strength that resists breaking under tension when stretched between stakes or pins for establishing level or plumb reference lines. This twine readily accepts chalk or paint for visible marking applications, making it versatile for both permanent and temporary layout work. The natural twist allows the line to maintain tension without excessive stretching, critical for accurate masonry coursing where even slight sag can compound into significant errors across long walls. Available in various colors including high-visibility fluorescent options, twisted twine serves as the backbone of masonry operations worldwide. Its economical price point makes it practical for single-use applications or situations where line will be cut and discarded after use. Keson's twisted mason twine meets the demanding standards of professional masons who depend on line that won't fail mid-course, break under working tension, or stretch excessively when establishing critical reference lines for foundations, walls, and structures. |
| Braided Mason Twine | Keson's Braided Mason Twine represents premium line construction engineered for professionals who demand maximum durability and reusability from their layout string. The braided structure creates a line that won't unravel, fray, or come apart even after repeated use, making it ideal for masons, landscapers, and contractors who maintain reusable line sets. Unlike twisted twine that can unwind or separate with handling, braided construction maintains its integrity throughout countless installations and removals. The braided format provides consistent diameter and smooth surface texture that runs cleanly through line blocks, pins, and guides without snagging or binding. This premium twine maintains excellent tensile strength while resisting stretching better than twisted alternatives, ensuring layout accuracy across long spans. The durable construction justifies the higher cost through extended service life—a single spool of braided twine can outlast multiple spools of twisted line. Professional masons particularly appreciate how braided twine winds cleanly back onto reels without tangling, saving setup time on subsequent jobs. Available in various colors and strengths, Keson's braided mason twine represents the professional's choice when line quality and longevity directly impact productivity and layout precision. | |
| Marking Paint | Paint Applicators | Keson's paint applicator wheels represent innovative multi-functionality, combining accurate distance measurement with simultaneous paint marking capability in a single tool. These specialized measuring wheels feature integrated paint reservoirs and application mechanisms that dispense marking paint as the wheel rolls, allowing users to measure and mark in one continuous operation. This dual functionality dramatically improves efficiency for parking lot striping, athletic field layout, utility locating, and any application requiring both distance measurement and visible marking. The applicators maintain the same 99.7% measurement accuracy as standard Keson measuring wheels while adding paint marking capability that eliminates the need for separate marking operations. Compatible with standard inverted marking paint cans, these wheels allow quick paint cartridge changes when colors need switching or paint runs out. The controlled paint flow system delivers consistent line width and prevents excessive overspray or waste. The rugged construction withstands the dual demands of measurement and marking operations, featuring durable frames and reliable counters. For contractors who need to establish measured layouts with permanent visible marks—parking lot stripers, athletic groundskeepers, and utility locators—paint applicator wheels eliminate redundant operations and slash project time. |
| Ultra-Mark Spray Paint | Keson's Ultra-Mark inverted spray paint is specially formulated for professional marking applications requiring superior brilliance, long-range visibility, and weather-resistant permanence. This advanced aerosol marking system delivers intensely pigmented lines in fluorescent and standard colors that remain visible across long distances and challenging conditions. The inverted spray technology allows marking in any orientation—upside down, sideways, or at awkward angles—without spray interruption or sputtering, critical for efficient marking operations. Ultra-Mark paint bonds tenaciously to concrete, asphalt, grass, gravel, and dirt surfaces while resisting fading from UV exposure, washing from rain, or wearing from traffic. The fast-dry formula minimizes smudging and tracking, allowing marked areas to be safely accessed quickly after application. The comfortable grip and precision valve provide controlled paint application that conserves material while creating crisp, professional-looking marks. Available in APWA (American Public Works Association) utility color codes plus additional high-visibility shades, Ultra-Mark serves utility locators, survey crews, parking lot contractors, and grounds maintenance professionals. The paint's exceptional visibility and permanence make it essential for critical infrastructure marking where safety and clarity cannot be compromised. | |
| Chalk Line Saver | Keson's Chalk Line Saver is an innovative clear spray coating that transforms temporary chalk lines into weather-resistant, traffic-proof marks that endure throughout project timelines. This protective spray forms a transparent barrier over chalk lines without obscuring their visibility, locking pigment to surfaces against wind, rain, foot traffic, and general job site activity that would normally obliterate unprotected chalk marks. The application is simple—snap chalk lines as normal, then overspray with Chalk Line Saver to seal them permanently. This solution addresses the perennial contractor frustration of disappeared layout lines, eliminating the need to re-snap marks repeatedly throughout projects. The clear formula works with any chalk color and doesn't alter line appearance or visibility. It's particularly valuable for exterior projects where weather threatens layout integrity, multi-day jobs where lines must survive between work phases, or high-traffic areas where layout marks must endure constant foot movement. The spray dries quickly to a durable finish that resists weathering far better than chalk alone while eventually allowing cleanup when marks are no longer needed. Chalk Line Saver represents Keson's problem-solving philosophy—identifying real contractor challenges and engineering elegant solutions that improve productivity and accuracy. | |
| Specialty Marking | Valve Paint Markers (Paint Pens) | Keson's valve paint markers deliver precise, controlled marking capability in a portable pen format, perfect for detailed annotations, part identification, quality control marking, and applications requiring more precision than spray paint or chalk can provide. These professional-grade markers feature valve-activated flow that delivers consistent paint release only when the tip is pressed against surfaces, preventing drips, runs, or accidental marks. The highly pigmented oil-based paint formulation bonds permanently to metal, concrete, wood, plastic, and virtually any construction material, creating marks that resist weather, chemicals, solvents, and abrasion. The fine tip allows detailed writing, numbering, or symbol marking that would be impossible with spray paint or chalk, making these markers essential for fabrication shops, quality inspectors, inventory management, and assembly operations. Available in multiple colors including high-visibility fluorescent shades, valve markers work on wet, oily, or dirty surfaces that would defeat conventional markers or pens. The durable metal barrel and replaceable valve tips ensure long service life, while the pocket clip provides convenient carry. These markers bridge the gap between temporary chalk marking and permanent identification, serving professionals who need precise, permanent marks for tracking, verification, or communication purposes. |
| Hard Lumber Crayons | Keson's hard lumber crayons are time-tested marking tools specifically formulated for rough lumber, timber framing, and construction applications where durable, visible marks must survive handling and weather exposure. These solid wax-based markers create bold, highly visible lines on wood surfaces without the equipment requirements of paint or chalk systems. The hard formulation resists breaking or crumbling in pockets or tool belts, while maintaining enough softness to mark clearly without excessive pressure that could damage wood fibers. Lumber crayons excel in applications from sawmill sorting and grade marking to framing layout and timber identification. The marks remain visible through rain, humidity, and handling that would eliminate chalk marks, yet won't bleed or run like liquid markers might. Available in multiple high-contrast colors, these crayons allow color-coded marking systems for grade identification, cut sequencing, or piece tracking. The economical cost and simple operation make them ideal for high-volume marking operations where electronic or complex marking systems are impractical. Carpenters, framers, timber framers, and lumber yard operators rely on these fundamental marking tools that have served the construction industry for generations, now manufactured to Keson's exacting quality standards. | |
| Lumber Crayon Holders | Keson's lumber crayon holders are ingeniously simple accessories that transform standard lumber crayons into precision marking instruments while protecting the crayon and improving user comfort. These holders grip crayons securely, extending them forward to create a pen-like marking tool that prevents hand fatigue during extended marking sessions and keeps users' hands clean from crayon residue. The holder design protects the crayon from breaking when dropped or jostled in tool belts, significantly extending crayon life and reducing waste. The extended grip allows marking in tight spaces or at awkward angles where finger-held crayons would be impractical, while the controlled crayon exposure prevents excessive wear or breaking of the crayon tip. Lumber crayon holders transform a basic marking tool into a more professional instrument, improving marking accuracy and comfort. They're particularly valued in production environments—lumber yards, truss plants, millwork shops—where workers mark hundreds of pieces daily. The holders accept standard lumber crayons, making them economical accessories that enhance rather than replace existing marking systems. These simple yet effective tools reflect Keson's understanding that even small improvements in tool ergonomics and functionality can significantly impact worker comfort and productivity across a full workday. | |
| Carpenter Pencils | Keson's carpenter pencils honor the construction industry's most fundamental marking tool while incorporating quality materials and design refinements that improve performance and longevity. These flat-profile pencils feature wide, soft graphite cores that create bold, visible marks on rough lumber, concrete forms, and construction materials without the breakage problems that plague conventional round pencils in job site environments. The rectangular cross-section prevents rolling when set down on sloped surfaces—a simple but critical feature that saves countless minutes otherwise spent chasing escaped pencils. The flat profile also provides comfortable grip during extended marking sessions and fits naturally in tool belts, aprons, and pockets without the rolling that makes round pencils frustrating to carry. Keson's carpenter pencils use quality wood construction that sharpens cleanly with utility knives—the carpenter's preferred sharpening method—without splintering or crumbling. The substantial lead width creates marks visible at working distances, while the softness ensures marking without excessive pressure that could score delicate materials. Available in bulk quantities at economical pricing, these fundamental tools serve carpenters, concrete form builders, and general contractors who need reliable, visible marking without the complexity or cost of advanced marking systems. | |
| Soapstone Chalk | Keson's soapstone marking chalk is the metalworking industry's time-honored solution for marking steel, cast iron, and other metals where conventional markers fail or create unacceptable surface contamination. This natural talc-based material creates bright white marks that remain highly visible on dark metal surfaces while being completely inert—it won't react with metals, interfere with welding, or contaminate surfaces prior to painting or coating. Soapstone marks withstand the intense heat of welding and cutting operations without burning away or creating toxic fumes, making them essential for fabrication shops, welding operations, and metal manufacturing. The solid stick format allows marking in tight spaces or along edges where paint markers or chalk would be impractical, while the soft material creates clear lines without scratching even polished metal surfaces. Soapstone marks wipe away cleanly when no longer needed, eliminating the permanent marking concerns associated with paint or etching. Available in stick form for direct hand marking or sized for use in mechanical soapstone holders, this fundamental metalworking tool has served fabricators, welders, and machinists for over a century. Keson provides quality soapstone that meets the exacting standards of professionals who depend on marks that are visible, heat-resistant, non-reactive, and easily removable. | |
| Caution Tape | Flagging Tape | Keson's flagging tape provides high-visibility temporary marking and identification in brilliant colors that command attention across job sites, forests, or survey areas. This thin, flexible vinyl tape tears easily by hand yet resists tearing from wind or incidental contact, creating temporary markers that stay in place until deliberately removed. Available in fluorescent and standard colors, flagging tape serves countless applications from marking survey points and property boundaries to identifying trees for removal, designating utility locations, or color-coding construction phases. The non-adhesive design allows tying around objects without leaving residue, while the weather-resistant material maintains visibility and integrity through rain, sun, and temperature extremes. Surveyors use flagging tape to mark traverse points and property corners that must remain identifiable for days or weeks. Foresters employ it for timber marking and trail designation. Construction crews use color-coded flagging to identify underground utilities, mark cut locations, or designate material staging areas. The economical price allows liberal use without cost concerns, while the bio-degradable options minimize environmental impact when tape is inadvertently left behind. Keson's flagging tape delivers the visibility, durability, and versatility that professionals across multiple industries depend upon for temporary yet reliable marking. |
| Barricade Tape | Keson's barricade tape delivers critical safety communication through bold, high-contrast messages that alert workers and the public to hazards, restricted areas, and dangerous conditions. Available in OSHA-compliant colors with messages including "CAUTION," "DANGER," "CRIME SCENE DO NOT CROSS," and custom text options, this highly visible tape creates temporary perimeters around hazardous areas, work zones, or restricted access points. The durable polyethylene construction resists tearing from wind while remaining economical enough for single-use applications. The bright yellow or red colors combined with bold black text ensure visibility across long distances and in varied lighting conditions, fulfilling critical safety communication requirements. Barricade tape stretches easily between posts, equipment, or trees to quickly establish safety perimeters without the time and expense of rigid barriers. The non-adhesive design allows rapid deployment and removal as work zones shift or hazards are mitigated. Construction sites use barricade tape to cordon excavations, overhead work zones, and equipment operation areas. Emergency responders employ it for scene control and public safety. Facility managers use it to designate closed areas during maintenance. Keson's barricade tape provides the visibility, durability, and clear communication that make temporary safety perimeters effective, keeping workers and the public safe from job site hazards. | |
| Underground Detectable Tape | Keson's underground detectable tape is a critical safety product designed to prevent catastrophic utility strikes by providing a visible warning layer above buried utilities. This specialized tape combines bold color-coding with embedded metallic foil that can be detected by metal locators even when buried several feet underground. Available in APWA standard colors (red for electric, yellow for gas, orange for communications, blue for water, green for sewer), the tape provides both visual identification during excavation and electronic detectability for utility location prior to digging. The bright colors and bold warning text ("CAUTION BURIED ELECTRIC LINE BELOW") alert excavation crews to stop digging and hand-expose the utility, preventing damage that could cause service interruptions, injuries, or fatalities. The durable polyethylene construction resists deterioration from soil chemicals, moisture, and biological activity, ensuring the tape remains intact and legible for decades after installation. The embedded metallic layer allows underground utility locators to trace buried lines even when physical markers are lost or original location records are incomplete. Installation is simple—the tape is laid in the trench directly above the utility during backfilling, typically 12-18 inches below grade. This simple, inexpensive safety measure provides permanent warning that protects utilities, workers, and the public from excavation accidents, making it essential for any utility installation project. | |
| Construction Flags | Surveyor Stake Flags | Keson's surveyor stake flags are essential marking tools that provide highly visible, weather-resistant identification of survey points, property corners, utility locations, and layout positions across construction sites and survey areas. These wire-staff mounted flags combine brilliant fluorescent colors with durable vinyl or plastic construction that withstands wind, rain, sun exposure, and incidental contact throughout project timelines. The flexible wire staff inserts easily into soil or attaches to wooden stakes, remaining visible above ground vegetation while resisting being pulled out by wind or wildlife. Available in fluorescent pink, orange, yellow, lime, and other high-visibility colors, the flags allow color-coded identification systems where different colors designate different utilities, survey point types, or construction phases. The large flag surface area ensures visibility from considerable distances, critical for survey work or utility location where markers must guide excavation equipment operators. Surveyor flags serve countless applications beyond traditional surveying—marking tree removal in forestry operations, designating utility crossings during underground installations, identifying property boundaries during development, or marking sampling locations during environmental surveys. The economical price and disposable nature make liberal use practical, ensuring adequate marking density for safe and accurate work. Keson's surveyor flags deliver the visibility, durability, and reliability that professionals depend upon for critical site marking. |
| Industry | Description | Information Links |
|---|---|---|
| Construction | Primary market serving general contractors, residential/commercial builders, concrete contractors, framers, and specialty trades. Keson provides essential tools for foundation layout (chalk lines, marking paint), structural work (levels, tape measures), and site measurement (measuring wheels for estimating materials). Products withstand harsh job site conditions including concrete dust, weather exposure, and heavy daily use. Key applications include laying out building footprints, checking grades and elevations, measuring rebar placement, marking cut lines, establishing control points, and quality control verification. Trusted by contractors for 55+ years due to unmatched durability and accuracy that reduces costly errors and rework | More Info |
| Land Surveying | Critical tools for professional land surveyors, cadastral surveyors, geodetic surveyors, and boundary specialists. Keson's RoadRunner measuring wheels provide quick distance verification between survey monuments with accuracy to 99.7%. Marking products enable clear identification of property corners, easements, and right-of-ways using ALTA/NSPS standard colors. Applications include boundary surveys, topographic mapping, construction staking, ALTA surveys, subdivision platting, and legal description verification. ProChalk permanent formulas mark survey points that must remain visible for years. Specialty measuring tools assist with slope distance calculations and elevation checks. Products meet stringent accuracy requirements for legal documentation and property records | More Info |
| Paving & Roadwork | Essential equipment for asphalt contractors, concrete paving crews, highway construction teams, and road maintenance departments. Keson measuring wheels accurately calculate lane striping distances, parking lot dimensions, and material quantities for bid estimates. ULTRA-MARK paint withstands hot asphalt application and vehicle traffic for layout marking. Heavy-duty chalk lines establish straight edges for paving machines and mark joint locations. Applications include highway resurfacing, parking lot construction, runway paving, bridge deck work, and pavement repair. Products resist petroleum products, extreme temperatures (20°F to 150°F), and heavy equipment vibration. DOT-approved marking products meet federal highway specifications. Tools proven on major infrastructure projects nationwide | More Info |
| Civil Engineering | Comprehensive solutions for civil engineering firms, municipal engineering departments, public works, and infrastructure developers. Tools support water/sewer installation, storm drainage projects, utility coordination, and site development. Measuring wheels calculate pipe runs and verify as-built conditions. APWA color-coded marking products prevent utility strikes during excavation. Applications include marking utility locations per One-Call requirements, measuring retention pond perimeters, laying out underground infrastructure, establishing grades for drainage, and documenting project dimensions. Products meet municipal specifications and engineering standards. Waterproof marking chalk works in manholes and wet conditions. High-visibility flags mark boring locations and test pits. Essential for infrastructure projects from design through construction and maintenance phases | More Info |
| Traffic Safety | Vital tools for traffic control companies, accident investigation teams, law enforcement, and road safety departments. Measuring wheels document accident scenes, skid marks, and debris fields for legal records. High-visibility Glo-Orange marking paint and flags establish work zones and detours visible day/night. Barricade tape meets MUTCD standards for temporary traffic control. Applications include accident reconstruction, work zone setup, pedestrian routing, event traffic management, and emergency scene marking. Products help meet OSHA visibility requirements and state DOT safety specifications. Reflective options enhance night visibility. Quick-deploy flags mark hazards immediately. Used by first responders nationwide and proven effective in saving lives through improved visibility and clear scene demarcation | More Info |
| Landscaping | Complete measuring and marking solutions for landscape contractors, hardscape installers, irrigation specialists, and grounds maintenance crews. Measuring wheels calculate material quantities for mulch, sod, and pavers while ensuring accurate billing. Marking paint and flags identify sprinkler heads, invisible fence lines, and landscape lighting routes. Chalk lines establish straight edges for paver installation and retaining walls. Applications include designing outdoor living spaces, laying out plant beds, marking irrigation zones, establishing lawn striping patterns, and measuring property for maintenance contracts. Weather-resistant products work in wet grass and soil conditions. Biodegradable marking options available for environmentally sensitive areas. Tools help landscape professionals deliver precise, professional results that exceed customer expectations | More Info |
| Utilities | Indispensable tools for electric, gas, water, telecommunications, and cable utilities. APWA color-coded marking products ensure compliance with One-Call/811 requirements: Red (electric), Yellow (gas/oil), Orange (communications), Blue (water), Purple (reclaimed water), Green (sewer), Pink (survey), White (proposed excavation). Measuring wheels verify locate distances and document utility paths. Applications include underground utility marking, pipeline route measurement, fiber optic cable runs, power line clearances, and emergency response. Products meet federal and state utility marking mandates. Weather-resistant formulas work year-round. High-stakes industry where accurate marking prevents catastrophic utility strikes, service disruptions, and potentially fatal accidents. Keson tools protect infrastructure worth billions | More Info |
| Railroad | Specialized tools for railroad construction, maintenance-of-way crews, and rail contractors. Measuring wheels calculate track footage, siding lengths, and ballast quantities. Heavy-duty marking products withstand railroad equipment vibration and petroleum exposure. Chalk lines establish track alignment and platform edges. Applications include rail replacement projects, grade crossing work, signal installation, bridge inspection, and derailment investigation. Products meet FRA safety requirements and AAR specifications. Tools function reliably around high-voltage catenary systems and in railroad's unique operating environment. Used by Class I railroads, short lines, and transit systems nationwide for maintaining critical transportation infrastructure | More Info |
| Mining & Quarrying | Rugged tools for surface mining, quarry operations, and aggregate production. Products withstand extreme dust, moisture, and heavy equipment vibration. Measuring wheels calculate haul road distances and blast pattern spacing. High-visibility marking products identify blast holes, safety zones, and equipment paths in low-visibility conditions. Applications include marking drill patterns, measuring bench heights, laying out crusher sites, and documenting excavation progress. Tools meet MSHA safety standards. Lumber crayons mark on wet stone and dusty surfaces. Products proven reliable in harsh mining environments from coal mines to granite quarries, helping maintain productivity and safety in demanding extraction operations | More Info |
| Agriculture | Versatile tools for farms, ranches, agricultural contractors, and irrigation specialists. Measuring wheels calculate field acreage, fence lines, and irrigation runs across rough terrain. Marking flags identify soil sampling locations, test plots, and crop boundaries. Applications include laying out center pivot systems, measuring grain bin foundations, marking tile drainage lines, and establishing windbreak placement. Weather-resistant products work in all growing conditions. Biodegradable marking options for organic operations. Tools help maximize yields through precise field layout and accurate chemical application zones. Essential for modern precision agriculture and farm management operations | More Info |
| Environmental & Geotechnical | Precision tools for environmental consulting firms, geotechnical engineers, and remediation contractors. Measuring wheels document contamination plume boundaries and calculate remediation areas. Marking products identify monitoring well locations, soil boring points, and sample grids per EPA protocols. Applications include Phase I/II site assessments, wetland delineation, groundwater monitoring, soil sampling programs, and brownfield redevelopment. Biodegradable marking products for sensitive ecosystems. Weather-resistant tools work in challenging field conditions. Products help ensure regulatory compliance and accurate environmental documentation critical for permits, litigation support, and remediation planning | More Info |
| Sports & Recreation | Professional-grade tools for athletic field maintenance, golf course construction, and recreational facility development. Measuring wheels layout soccer fields, baseball diamonds, and track dimensions to official specifications. Marking paint creates crisp field lines that withstand weather and play. Applications include striping athletic fields, measuring cross country courses, laying out tennis courts, and establishing playground boundaries. Products meet NCAA, NFHS, and professional sports standards. Environmentally safe formulas for turf applications. Tools help groundskeepers and facility managers maintain professional-quality playing surfaces that enhance athlete performance and safety | More Info |
| Insurance & Real Estate | Accurate measurement tools for insurance adjusters, property appraisers, real estate professionals, and home inspectors. Measuring wheels document property dimensions, calculate roof areas for claims, and verify lot sizes for listings. Tape measures confirm room dimensions and structural measurements. Applications include storm damage assessment, property valuation, casualty investigations, and documenting pre-existing conditions. Products provide legally defensible measurements for claims processing and property transactions. Digital options available for integrated reporting. Tools trusted by major insurance carriers and assessment professionals for accurate documentation that protects all parties in property transactions | More Info |
| Law Enforcement & Forensics | Precise measurement and marking tools for crime scene investigation, accident reconstruction, and evidence documentation. Measuring wheels record distances for scene diagrams admissible in court. High-visibility marking products establish evidence perimeters and photo reference points. Applications include traffic accident investigation, crime scene documentation, search grid establishment, and evidence chain-of-custody. Products meet law enforcement evidence standards and court admissibility requirements. Tools provide accurate measurements crucial for prosecution, insurance claims, and legal proceedings. Trusted by federal, state, and local law enforcement agencies for maintaining evidence integrity | More Info |
| Contact Type | Telephone | Fax | Area Served | Available Language |
|---|---|---|---|---|
| General Inquiries | (630) 820-4200 | (800) 345-8849 | North America | English |
| Sales (Toll-Free) | (800) 345-3766 | - | United States & Canada | English |
| Profiles | Information Links |
|---|---|
| Official Website | www.keson.com |
| About Page | Keson About Us |
| Keson on LinkedIn | |
| SOLA Partnership | SOLA Measuring Tools |
"If a job is worth doing, it's worth doing right." - Roy Nosek, Founder
This philosophy, established by our founder in 1968, continues to guide Keson Industries today. We believe that outstanding service is just as important as outstanding products, and our commitment to both has made us a vital resource to professional tradespeople and contractors for over 55 years.
We're proud to be an American manufacturer. Our Aurora, Illinois facility produces world-class products including our renowned marking chalk, Giant chalk reels, and measuring wheels. We mold plastic wheel hubs, rubber tires, and many other component parts right here at our factory.
In 2018, two industry leaders joined forces. Keson, founded in 1968 in the basement of the Nosek family home in Berwyn, Illinois, and SOLA, founded in 1949 with a leveling tool invented on the roof of the Scheyer family home in Goetzis, Austria. Both third-generation family companies share very similar values and bring complementary strengths: Keson's U.S. manufacturing and distribution network combined with SOLA's European manufacturing expertise and precision engineering create an unmatched partnership in the measuring and marking tools industry.
