Diablo's next generation Hard Tile & Stone Carbide Tipped Drill Bit range provides faster starts and up to 10X longer life in tile, stone, and glass versus standard glass and tile drill bits. 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 Grip Point 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. Includes (1) 1/8" bit, (1) 3/16 In. bit, (2) 1/4 In. bits, and (1) 5/16 In. bit.