Milwaukee SHOCKWAVE TX20 Impact Bit is 50mm long and has a hex grip. The combination of the SHOCK ZONE design and the special heat treatment allows the tip to bend and results in less risk of the tip breaking. Designed for use with impact drivers, the SHOCKWAVE™ IMPACT DUTY accessory line is not only ideal for heavy duty impact applications, but also provides a complete system solution for all the user's drilling and fastening needs.