The Milwaukee Shockwave Locking Screwdriver Bit Holder is custom made with engineered steel making the Shockwave bits more resistant to shock from impacting. It is also created with an optimised shockzone which absorbs up to 3x more torque. Features dual internal magnets to ensure magnetism to fasteners and an auto-locking one handed bit release. 1/4? Hex reception which is very suitable for high torque and impact applications. Specifications • Length: 305mm • Shank Reception: 1/4" Hex Features and Benefits • Custom engineered steel makes the Shockwave bits more resistant to shock from impacting • Optimised Shockzone absorbs up to 3x more torque • Dual internal magnets ensure magnetism to fasteners • Auto Locking one handed bit release • 1/4? Hex reception very suitable for high torque and impact applications