Bosch 7/8" x 10" x 12" Blue Granite Turbo Carbide Hammer Bit has an ergo grip round shank that provides better grip for great speed. The 4 grind head delivers two more cutting angles for longer life and faster speed. The multi-grind carbide centering tip offers accurate starts in brick, masonry and more. The robust bit head provides long life in impact applications. The milled U-flutes with deep cut spirals deliver fast dust removal. Bosch made carbide delivers outstanding durability under heavy loads. It is ANSI approved.