IRWIN® Standard Marking Chalks, 8 oz, Blue (586-64901)

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. For non-permanent lines use white or blue color. Fluorescent colors for low visibility applications. Color(s): Blue.