Diablo's Tile and Stone Carbide Tipped Drill Bit range provides faster starts and longer life in tile， stone and glass. Optimized with a unique brazing and hardening process， the carbide tip extends life and productivity， allowing users to drill fast， accurate holes. The multi-ground carbide tip design allows for aggressive starts that produce clean holes when drilling into hard materials. The 3-Flat Shank provides extra stability by eliminating spinning in the drill chuck.