5LB White Powder Chalk

Irwin Strait Line 5 lb. White Chalk Refill. High visibility chalk for self-chalking. For use on a variety of surfaces including wood, drywall, concrete, stone & metal. Permanent colors, especially black & red, produce long lasting lines that won't fade. Temporary colors, especially white & blue, provide high visibility & are easy to remove. Proprietary formulations for dark, sharp lines & reliable performance. Chalk containers are filled by weight not volume.