Shockwave Impact Duty 1/4" hex drive drill bits are engineered for extreme durability and up to 10 times life. Made from proprietary steel and a heat-treated process for maximum strength and durability. Bits features the Thunderbolt tapered web and parabolic flute for durability and chip removal. 135 degree slip point starts on contact and eliminates walking. Taper-fit construction makes the bit stronger and eliminates wobble. The Shockwave Impact Duty accessory line is not only ideal for heavy-duty impact applications, but delivers a full system solution for all the user's drilling and fastening needs.