Mutt Tools #18 Braided Nylon Mason Construction String Line, 500ft White — Open-Box, 11% Off

#18 Braided Nylon Construction: Tightly braided #18 nylon string resists fraying, stretching and moisture absorption; holds a straight line in wind and weather for accurate alignment across long spans

High Visibility Colors: Bright through-braid color stays visible against concrete, soil, brick and asphalt; UV-stable dye resists fading in direct sunlight for multi-day layout projects

Professional Mason String Line: Trusted by bricklayers, block masons and concrete finishers for level courses and straight walls; lightweight spool feeds smoothly from a line reel or tie wire reel

Multiple Lengths Available: Choose 250ft, 500ft, or 1000ft to match your project scale; generous spool length reduces mid-job changes on large foundations, landscaping layouts and survey runs

Clean Cut Non-Fray Line: Braided construction cuts cleanly without unraveling; no wasted time re-twisting frayed ends; consistent diameter maintains accuracy across the full spool for reliable lines

This #18 braided nylon construction string line is built for masons, landscapers, surveyors and contractors who need a reliable, high-visibility reference line on the job site. The tightly braided nylon construction resists fraying, stretching and moisture absorption, maintaining a straight, taut line across long spans even in windy conditions. Available in bright orange, white, pink and yellow with UV-stable through-braid color that stays visible against all background surfaces. The color runs through the full braid, not just a surface coating, so it remains easy to spot throughout the life of the spool. Choose from 250ft, 500ft, or 1000ft spool lengths to match your project requirements. The generous length options reduce mid-job spool changes on large-scale foundations, fence lines, landscaping layouts and survey runs. Whether you are laying brick courses, setting block walls, grading a landscape, marking survey boundaries, or aligning concrete forms, this string line delivers the accuracy and durability professionals demand. The braided construction feeds smoothly from a line reel or tie wire reel without tangling or kinking. Cuts cleanly without unraveling, so you spend less time managing frayed ends and more time working. Consistent diameter across the full spool ensures reliable reference lines from start to finish.