Diablo DMARG1030-P5 Demon Red Granite Carbide Tipped Hammer Drill BitDiablo's Speed Demon red granite carbide tipped hammer drill bit range provides one of the fastest and longest lasting drilling solutions on the market for concrete, masonry and stone. Highlights: Size : 3 16 inch x 4 inch x 6 inch Speed Demon red granite carbide tipped hammer drill bit 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