Designed for use with impact drivers, the Milwaukee 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. TX BO bits have a central bore hole and are often needed for security screws. Specifications • Size: TXBO10 • Length: 25mm • Pack Quantity: 2 Features and Benefits • Laser hardened Wear Guard Tip: improves wear resistance and helps to retain a better fit in the fastener • Shock Zone Geometry - designed to flex instead of breaking • Shock Zone reduces stress at the tip, resulting in less tip breakages. • A special heat treatment also absorbs impacts and allows the bit to flex • Custom engineered steel - Milwaukee custom metal formula makes the Shockwave bits more resistant to shock