Drilax Diamond Coated Core Hole Saw 4-3/8 Inch Drill Bit Diamond Coated Hole Saw Drilling Holesaw Tool 4 3/8" - Larger Than 4 Inches EASILY Cuts Through Ceramic and Porcelain Tile - Glass, Marble, Granite, Quartz - USE WATER TO COOL 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 Cylindrical Shank 3/8" - No Need for Adapters or Arbor