The Jet 1/2" Super Duty Impact Wrench features a twin hammer impact mechanism designed for industrial, heavy-duty applications. The wrench has 2 identical hammers that provide instantaneous and balanced torque for the maximum possible power. The J-1700P also features a variable speed trigger design and easy-to-reach forward/reverse switch for excellent operator control. The front exhaust on the wrench directs air away from the operator. ADDITIONAL SPECIFICATIONS: Square Drive: 1/2"; Bolt Capacity: 5/8"; Anvil Retainer Type: Ring; Max Torque (ft-lbs): 407; Working Torque (ft-lbs): 82-325; Free Speed (RPM): 6500; Air Con. (CFM): 23; Air Inlet (NPT/IN): 1/4; Air Hose (ID/IN): 3/8; Vibration Value: 3.2; Overall Length: 7"