Drilax 3-3/8" Diamond Drill Bit Hole Saw Ceramic Porcelain Tile Glass Marble, Granite, Quartz Cutting Coated Circular Saw Tip Wet Drilling Core Grit 3 3/8 Inches in DIY Drilax010085 3 3/8" Diameter Diamond Coated Drilling Holesaw Tool - Larger Than 3 inches - Smaller Than 3 1/2" 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