5pcs Diamond Tile Hole Cutter Set with 1/4 inch Shank
These are recommended for the drilling of all types of ceramic tiles, especially porcelain tiles, and other stone materials such as marble and granite.
It contain wax inside. This wax melts can facilitate cooling and the evacuation of drilling remains when using the drill bit.
Because of the different operation methods, RPM and stone material Thickness, Raizi diamond tile drill bits work life and the number of holes will be different. So it is necessary to maintain the proper speed and proper cooling of the drilling bits.