This Chicago Pneumatic is the smoothest operating 3/4in. air impact wrench on the market. Features one-hand pushbutton forward/reverse regulator and a comfortable contoured handle grip. Great for spring work, truck and bus maintenance, farm machinery and construction equipment. Drive (in.): 3/4, Impacts Per Minute (IPM): 900, Average Air Consumption (CFM): 6, Reversible: Yes, Hammer Mechanism: Dynapact clutch, Tool Length (in.): 9 5/8, Inlet Size (in.): 1/4, Noise Level (dB): 96, CFM at Load: 11.3, Speed - No Load (RPM): 4,200, Working Torque (ft.-lb.): 150-700, Standard Bolt Capacity (in.): 1, Tool Weight (lbs.): 10.5, Variable Speed: Yes, Max. Reverse Torque (ft.-lbs.): 1,000