Brown Glass & Tile Drill Bit measuring 3/8 inch (9.5 mm), specially designed for drilling clean, accurate holes in glass, ceramic tile, porcelain, mirrors, and other hard surfaces. Featuring a durable tungsten carbide spear-point tip, this drill bit helps reduce chipping and wandering while providing smooth drilling performance. Ideal for tile installation, bathroom renovations, and general construction projects when used with a standard drill at low speeds.