Blue granite turbo, 7/8" x 10" x 12", carbide hammer bit, ergo grip round shank provides better grip for great speed, 4 grind head delivers two more cutting angles for longer life & faster speed, multi-grind carbide centering tip offers accurate starts in brick, masonry & more, robust bit head provides long life in impact applications, milled u-flutes with deep cut spirals delivers fast dust removal, bosch made carbide delivers outstanding durability under heavy loads.