The function and the technique parameters of this Air Impact Wrenches are the top-class level in the same kind Air Impact Wrenches in the world. This Air Impact Wrenches can satisfy customer's request such as design, material, manufacturing craft, useful life and after-sales service etc. Vibrating and the noise are in accordance with ISO-8662 series and ISO-3744 international standard. Characteristics: Big torque, long life, high stability, little vibration, small volume, low wasting energy. Applied: Upscale automobile maintenance, repairing, Heavy industry professional manufactory and and brand store. Square drive: 3/4'' Free Speed: 4600RPM Bolt capacity: 22mm Max Torque: 885FT-LB(1200N-M) Hammer mechanism: Twin hammer Air inlet: 3/8'' Air pressure: 6-8 kg/cm2 Axes length: 1.5'' Moment bound: 500 - 1100NM N. W: 4.9Kg Qty/Ctn: 4 PCS Carton measurement: 585 *290*235mm