Each Tile Hole Saw with a Removable Center Guide Bit--No Special Guiding Tools Needed 2 inch Diamond Hole Saw with Triple-Layer Diamond Coating for Enhanced Performance Triangle Shank - Standard 3/8" Shank for Standard Drills Long Service Life, Reusable -- Cut Clean, Precise, Fast, and Dustless Cuts Every Time Solid Steel Body: Spins True, Cools Better, Lasts Longer 50 mm Hole Saw Drills Through Marble, Granite, Porcelain, Ceramics, Tiles, Glass 50mm Diamond Hole Saw with Pilot Bit, 2 Inch Tile Hole Saw for Porcelain, Glass, Ceramics, Marble and Granite