Irwin Strait-Line 5 lb. Blue Temporary Marking Chalk

High visibility chalk for self chalking line reels   For use on a variety of surfaces including wood, drywall, concrete, stone, and metal   Permanent colors, especially black and red, produce long lasting lines that won't fade   Chalk containers are filled by weight, not volume   Temporary colors, especially white and blue, provide high visibility and are easy to remove   Proprietary formulations for dark, sharp lines and reliable performance   Chalk containers are filled by weight not volume