Grip Tight Tools 5/16" Multi-Purpose Drill Bit

This multi-purpose drill bit features a Cobalt and Tungsten Carbide Tip with a Chrome Vanadium Steel Shank. It's designed for industrial quality use on a variety of materials. Applications include Cast Iron, Harden Steel, Ceramic Tile, Glass, Plexiglass, Fiberglass, Concrete, Marble, Porcelain, Laminates, and Wood. Brand New. Price firm.