Milwaukee 4932472056 SHOCKWAVE Impact Screwdriver Bit Set specifically designed and manufactured for use with Impact Drivers, the SHOCKWAVE IMPACT DUTY accessory line is not only superb for heavy duty impact applications but also delivers a full system solution for all trade drilling and fastening requirements. This 4932472056 Milwaukee Impact Screwdriver Bit Set uses laser hardened Wear Guard Tips for improved wear resistance and protection of the fit over the life of the bit plus the SHOCK ZONE Geometry is designed to flex and reduces stress at the tip resulting in less tip breakages. The combination of the SHOCK ZONE design and special heat treatment absorbs impacts and allows this Milwaukee Impact Bit to flex with spring like action. 32pce 4932472056 Impact Screwdriver Bit Set is manufactured from custom engineered steel, Milwaukee custom metal formula makes the SHOCKWAVE bits more resistant to shock from impacting.