Provided by the Home Depot Prospective bosch BlueGranite Turbo Carbide Hammer Drill Bits Assortment Pack Tested up to 5x longer life than standard bits Redesigned with hex shanks for high-torque impact drivers Upgraded build - delivers 5 x life and 2 x speed over standard masonry bits Hex shanks and impact rated allows use in impact drivers and hammer drill/drivers for added versatility. 4-grind head delivers 2 more cutting angles for longer life and faster speed Multi-grind carbide centering tip offers accurate starts in brick, masonry and 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 Includes: (1) 5/32 in. x 2 in. x 3 in., (1) 3/16 in. x 4 in. x 6 in., (1) 1/4 in. x 4 in. x 6 in., (1) 5/16 in. x 4 in. x 6 in., (1) 3/8 in. x 4 in. x 6 in. bits