The Milwaukee 4932464240 is a 32 Piece Bit Set specifically 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 the user's drilling and fastening needs. featuring SHOCKZONE Geometry which is designed to Flex. SHOCKZONE reduces stress at the tip resulting in less tip breakages. The combination of the SHOCKZONE design and special heat treatment absorbs impacts and allows the bit to flex with spring like action. Compression forged tips provide the best fit with screw heads reducing cam out and stripping, resulting in outstanding lifetime. Custom engineered steel, Milwaukee custom metal formula makes the SHOCKWAVE bits more resistant to shock from impacting.