Features and Benefits:�Optimized Shockwave absorbs peak torque and prevents breaking�Stainless Steel Sleeve extends for improved fastener stability�Laser Etched Depth Gauge for increased fastener control�Magnet holds fasteners to the drive guide�C-ring retains the insert bit�Custom alloy 76 steel maximizes resistance to wear and shock�For use with 1" insert style driver bitsMilwaukee SHOCKWAVE Impact Duty magnetic drive guides are engineered for extreme durability and up to 30x life. They feature an optimized Shockzone that absorbs peak torque and prevents them from breaking. The stainless steel sleeve slides over the fastener for improved stability while the barrel has laser etched depth gauge for increased fastener control. The drive guide is magnetic to hold the fastener, while a c-ring retains the driver bit.