- 15 sizes: 6mm/0.24",8mm/0.31", 10mm/0.39", 12mm/0.47", 14mm/0.55", 16mm/0.63", 18mm/0.71", 20mm/0.79", 22mm/0.87", 25mm/0.98", 26mm/1.02", 28mm/1.10", 30mm/1.81", 40mm/1.57", 50mm/1.97"
- rustless & durable: made of high strength carbon steel with smooth nickel plating surface to extend the service life.
- quick, sharp & smooth cut: coated with high quality diamond sharp, high precision and smooth cut with no broken edges fast
- suitable for drilling glass, tile bottles, blocks jars, fiberglass, porcelain, tile, ceramic, slate mable, granite, light stone
- not for use on concrete or for depths beyond about 1/2′′
- attention: please keep the speed in 800-1000 per minute, keep adding water to keep the drill cool