Milwaukee® SHOCKWAVE™ Impact Duty 1/4" Hex Drive Drill Bits are engineered for extreme durability and up to 10x life. Made from proprietary steel and heat treated to control hardness, the SHOCKWAVE™ Impact Duty Hex Drive Drill Bits feature the Milwaukee Thunderbolt® web for durability and chip removal.  The bits include a 135° split point to allow the bit to start on contact and eliminates walking.