Feature:1. The head is brazed with emery, and the head is filled with secret cooling wax for cooling and lubrication.2. It is recommended to use an angle grinder (need to be equipped with an additional adapter), the speed of the angle grinder is tens of thousands.3. Under reasonable operation, the average time of each hole is about 15‑20 seconds, so the hole is efficient and the service life is stable.4. Upgraded version of the drill, direct dry drilling without adding water, instead of triangular drills and tile hole openers on the market.5. Suitable for all kinds of all‑ceramic tiles (vitrified tiles, polished tiles, glazed tiles, antique tiles, floor tiles, microcrystalline tiles), quartz stone, granite, ceramic tiles and other hard and brittle materials.Specification:Condition: 100% Brand NewItem Type: Drill BitMaterial: DiamondsColor: Black Feature: No need to add waterSize: Approx. 14mm / 0.6inApplicable Equipment: electric drill, bench drill and other equipmentPackage List:3 x Drill Bit