Chicago Pneumatic CP7749 &frac12; in. Air Impact Wrench &ndash; Pneumatic Tool with Twin Hammer Mechanism. Impact Wrenches Heavy-Duty Materials: Front housing of the torque wrench is made using aluminum alloy while a curved handle is injected with thermoplastic rubber that provides insulation and resistance to most chemicals in workshops. Easy-to-Use Air Impact Wrench: Power setting system of air tool is positioned behind the trigger that allows 1-hand operation and easy accessibility. Torque wrench is crafted with latest S2S technology for forward/reverse functionality. Portable and Powerful Hand tool: Pneumatic wrench weighs 3.95 lbs. and offers a maximum real torque of 1300 NM in reverse. Adjustable torque wrench is carefully designed to work in tighter areas. Versatile Applications: This high torque wrench is a suitable hand tool for light vehicle tire changing, general maintenance of vehicles and MRO applications. Bilateral 2-stage trigger offers greater control. Specifications: Air wrench is made with twin hammer mechanism for rigorous power. Pneumatic tool provides free speed up to 9000 rpm with a working torque of 75-580 ft. lbs.