Blugranite turbo, 5/16″ x 4″ x 6″, carbide, hammer drill bit, upgraded build delivers 5x life & 2x speed over standard masonry bits, hex shanks & impact rated allows use in impact drivers & hammer drill/drivers for added versatility, 4 grind head delivers 2 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, 5/16″ diameter, 4″ flute length, 6″ length, 6″ overall length, .3125″ shank diameter, 4″ useable length.