– 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