Irwin 8 Oz. White Marking Chalk

White Standard Marking Chalk - 8 oz. 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. Interior or exterior use. Marks are temporary. Provides great visibility.