Bosch BlueGranite Turbo HCBG26T Hammer Drill Bit, 1 in Dia, 6 in OAL, Milled Flute, 2-Flute, 3/8 in Dia ShankBosch BlueGranite Turbo carbide hammer drill bits deliver 5X life and 2X speed over standard masonry bits, resulting in increased on the job productivity. Each bit delivers an aggressive hold in the hammer drill achieved with the power grip shank. The bit features an upgraded four grind head, delivering additional cutting angles for faster drilling. The multi grind centering tip also provides for precise starts in masonry, block and concrete. Unit: CD