The RPG 1/2" Drive Super Duty Air Impact Wrench is powered by a durable and high performing twin hammer mechanism, the company says. The impact wrench features a handle exhaust that conveniently directs air away from the work piece and operator, and also comes with a durable rubber grip that provides slip-free convenience and reduces fatigue. The tools is 6.1" long, weighs 5.95 lbs and delivers a maximum torque of 600 ft-lbs, a free speed of 8,000 rpm and has an average air consumption of 4 cfm.