Bosch BlueGranite Turbo Carbide Hammer Drill Bits are designed for fast, precise drilling in concrete, stone, and masonry. This builds on Bosch’s legendary 80-year heritage of developing tools and accessories for the concrete professional. These bits deliver better life and up to 2x speed over standard masonry bits, resulting in increased on-the-job productivity. Several of the smaller diameter bits have been redesigned with a hex shank, ideal for use in today's higher torque hammer drills and impact drivers. These bits feature an upgraded four-grind head, delivering additional cutting angles for faster drilling. Several of the larger diameter bits have a PowerGrip shank for aggressive gripping power.