Powerful twin hammer clutch produces 550 ft/lbs of torque. Our most powerful 1/2" impact wrench. Push button direction change for quick and easy operation. Built-in air regulator has 6 torque settings for precise speed control. Comfortable soft touch finish for improved comfort and control.Ideal for changing tires, shock/spring work, and other automotive jobs. Specifications: 1/2" Dr., Max Torque: 550ft/lbs, Working Torque: 25-250 ft/lbs, Free Speed RPM: 7,000, Avg CFM: 8, Air Inlet NPT: 1/4", Standard Bolt Size: 5/8".