Hardin HHP+SET Hydro-Handle Glass Tile Concrete Wet Diamond Core Drill Bit Hole Saw Set Cordless Drill Adapter Drill most material with diamond bits in kit; 1/4", 5/16", 3/8", 1/2", 3/4", 1", 1-3/8", 1-1/2", 2" Shape edges of tile, granite, marble and stone with vacuum brazed profile wheels (sold separately) Polish tile, marble, porcelain, glass and stone with 3" diamond polishing pads (not included) With pads (not included) effectively remove hard water on shower doors, windows and glass on boats