Drilax 3-1/8" Diamond Drill Bit Hole Saw Ceramic Porcelain Tile Glass Marble Granite Quartz Cutting Coated Circular Saw Tip Wet Drilling Core Grit 3 1/8 Inches in (Larger Than 3") Drilax010080 Diamond Coated Drilling Holesaw Tool 3 1/8" - Slightly Larger Than 3 inches Cuts Through Ceramic and Porcelain Tile - Glass, Marble, Granite Use with Any Electric Drill - Diamond Circular Hole Saw for Floor Drain, Shower, Shower Mixing Valve, Shower Drain Installation Drills 1 inch deep - Wet Type - Do not use dry - No Pilot Drill Bit - Pilots are not required Circular Shank 3/8" - Can be used with Drilax Diamond Hole Saw Guide