Impact Wrench Power Source Air Powered Air Consumption 28 cfm Air Inlet 1/4 in NPT Female Air Pressure 90 psi Max Air Pressure 90 psi Min Air Pressure 50 psi Min Hose Size 3/8 in Exhaust Location Bottom Duty Rating General Duty Breakaway Torque 500 ft-lb Fastening Torque 500 ft-lb Free Speed 4 500 RPM Impact Rated Yes Impact Sound Level 90 dB Impacts per Minute 650 Number of Speed Settings Continuous Max Bolt Capacity 7/8 in Drive Size 3/4 in Square Drive Type Standard