Precision Diamond Tools 5 Diamond Dust Hole Saw for Tile / Glass/ Marble / Granite / Ceramic / Porcelain / Stone Holesaw 3/4", 1", 1-3/16", 1-3/8",...

The diamond particule coating on DRILAX hole saws give superior performance and lifetime. Please note our tools do not need center pilot holes. Center pilot hole drills are mostly for wood, metal, etc..