"The superior mechanics and internal mechanisms of the AirCat super duty impact wrench includes high-quality bearing surfaces, air chambers and turbines. The patented exhaust muffler/filter technology reduces the level of noise while retaining more power and torque. A quiet, powerful tool ideal for shop or home applications. Min. Hose Size in. 1/2, Noise Level dB 85, Drive in. 3/4, Hammer Mechanism Twin, Speed - No Load RPM 4,500, Tool Length in. 9 1/4, Average Air Consumption CFM 8, Inlet Size in. 3/8, Max. Torque ft.-lbs. 1,400, Tool Weight lbs. 7.9, Variable Speed Yes, Operating PSI 90-120, Reversible Yes, Working Torque ft.-lb. 200-1200. 90-120 PSI air pressure Twin hammer 'Super Clutch' mechanism Lightweight composite body Ergonomic grip handle for comfort Easy thumb forward and reverse"