Milwaukee 9071-20 1/2" Impact Wrench with Rocker Switch and Friction Ring Socket Retention (300 ft lbs). Delivering 300 ft. lbs. of torque and weighing only 6 pounds, this tool has a great power to weight ratio. The powerful 7.0 amp motor drives a unique impact mechanism at 1800 RPM (no load). This model features a friction ring ('hog' ring) socket retention system for applications involving frequent changing of accessories, and a rocker switch for quick selection of forward or reverse. The ergonomically shaped handle with a soft cushioned grip provides a well-balanced and controllable feel to the tool. The special mechanism achieves desired installation torque faster and loosens rusted or fretted bolts in less time. AC/DC rocker switch for quick selection of forward and reverse. Friction ring ('hog' ring) socket retention system.