Irwin Strait Line 5 lb. White Chalk Refill is a high visibility chalk designed for self-chalking. It can be used on a variety of surfaces including wood, drywall, concrete, stone, and metal. The permanent colors, especially black and red, produce long lasting lines that won't fade. The temporary colors, especially white and blue, provide high visibility and are easy to remove. The proprietary formulations ensure dark, sharp lines and reliable performance. The chalk containers are filled by weight, not volume.

• 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.