JINGLING 60mm 2-3/8" inch Diamond Coated Tool Drill Bit Hole Saw for Glass Tile Ceramic Marble Color Silver Product Name: 60mm Diamond tip drill bit, 60 mm Glass hole saw bit, Glass drill bit Suitable for use in drill hole on glass, tile, ceramic, stone, marble or granite Hole Diameter: 60mm; Shank Diameter: 10mm (3/8"); Total Length: 55mm Start drill at 45 degree to surface and align to 90 Degree as hole forms The hole does not need further work because the cut is clean