Delivering 300 ft-lbs. of torque and weighing only 6 pounds, this Milwaukee 7 Amp 1/2" Impact Wrench with Pin Detent Retainer (9070-20) has a great power-to-weight ratio. It features a pin-detent system to securely retain sockets or adapters, and a rocker switch for quick selection of forward or reverse. The powerful 7.0 amp motor drives a unique impact mechanism at 1,800 RPM (no load). The special mechanism achieves desired installation torque faster and loosens rusted or fretted bolts in less time. In addition to the features designed to make your work go by faster, the Milwaukee 9070-20 1/2" electric impact wrench is also made to be more comfortable. The ergonomically shaped handle with a soft cushioned grip provides a well-balanced and controllable feel. And the 6.0 lbs. weight makes it preferable to heavier impact wrenches.