For use with cordless and corded drills. Engineered for extreme durability and long life. Made from proprietary steel and heat treated to control hardness. Features the Milwaukee thunderbolt web for durability and chip removal paired with taper-fit construction for a stronger bit with less wobble. Bits include a 135 degree split point to allow the bit to start on contact and eliminate walking. Ideal for heavy duty impact applications, but delivers a full system solution for all the user's drilling and fastening needs.