DuraMark ChalkShot High-Visibility Marking Tool Quickly mark drilling locations through brackets, templates and other hard-to-reach openings with ChalkShot . The applicator shoots a burst of high-visibility green chalk directly onto the surface, creating a clear, non-permanent reference mark without a pen tip or nib that can clog, break or dry out. Key Features High-visibility green chalk creates clear, easy-to-see reference points on a wide variety of surfaces. Marks through templates and openings up to 2" thick, ideal for locating blind drilling points. Works on challenging surfaces, including those covered with grease, dirt or rust, and wipes away easily when repositioning is required. Provides 250+ marking bursts per unit without the clogging, damaged tips or drying associated with conventional markers.