This Magnum Air ½” Drive Air Impact Wrench delivers the muscle, performance and torque to undertake just about any jobs you come across This Air Impact Wrench has a 9/16"in. bolt capacity and an air consumption of 4.2 CFM. A blend of 423 ft.-lbs. of torque and 8000 BPM work together to remove lug nuts, loosen stubborn and rusted nuts and bolts, eliminate crank pulley bolts and more.