Diamond Hole Saw for Tiles, Porcelain, Glass, Marble and Ceramic (68 mm)

Diamond Hole Saw with Pilot Drill Bit Drill a clean hole on glass, tile, marble, porcelain and ceramics etc. The pilot drill can avoid sliding problems and drill a precise hole. Thick diamond coating ensures service life. Uniform diamond coating ensures performance. Clearance hole allows water to cool hole saws and remove chips faster. Compatible with electric drills, cordless drills and bench drills. Notes on use: 1. Always use water for cooling, otherwise the diamond bit will burn. 2. Remove the pilot drill bit after drilling the circular slot for a service life. 3. Reduced drilling speed, low drilling pressure. 4. Hole saws are consumables, and their service life varies depending on the hardness of the materials. 5. Do not use on metal, tempered glass and do not use impact mode.