Superior Diamond Tools Dry Diamond Drill Bits 3pcs Quick Change Hex Shank

Application — Diamond tip drill bits designed for porcelain, ceramic, granite, marble, masonry, concrete, various types of tile and stone. Performance — Vacuum brazed diamond technology provides fast, chip free holes while maintaining a long life. Shank — Quick change hex shank provides better chuck grip and fits different styles of drills. Self Cooling — Diamond tipped drill bit are integrated with wax. The wax melts while drilling absorbing and dissipating heat allowing for Dry drilling (water may be added for longer life and harder stones).