Milwaukee SHOCKWAVE� Impact Duty TORX Bits have been specially designed for use with impact drivers. The SHOCKWAVE� Impact Duty accessory line is not only ideal for heavy-duty impact applications, but also delivers a full system solution for all of the user's drilling and fastening needs. Made from custom engineered steel, this custom metal formula makes the SHOCKWAVE� bits more resistant to shock from impacting. With a laser hardened WEAR GUARD TIP� for improved wear resistance and protection of the fit over the life of the bit. SHOCK ZONE� Geometry, designed to flex, reduces stress at the tip resulting in fewer tip breakages. The combination of the SHOCK ZONE� design and special heat treatment absorbs impacts and allows the bit to flex with a spring-like action