Item Type: Diamond Drill Bits Material: Diamond Specification: Approx. 3mm / 0.12in, 4mm / 0.16in, 5mm / 0.2in, 6mm / 0.24in, 8mm / 0.3in, 10mm / 0.39in, 12mm / 0.47in, 18mm / 0.71in, 32mm / 1.26in, 50mm / 1.97in 1Large Torsion: The bearing calendar is high, effectively preventing slipping and clamping more stable 2Rugged and Durable: Not easy to break the handle, improve work efficiency, achieve high precise and glossy cutting, without curling. 3Fast: The drilling speed is fast, the hole diameter is round and there is no nick, and the maximum drilling effect is achieved. 4Labor Saving: The design of the cut out is larger, which reduces the resistance when opening the hole. 5Applicability: This diamond hole saw bit can be used to remove rings on glass, marble, ceramic tiles, ceramics, PVC or other materials.10 x Hole Opener