Impact Wrench Power Source Air Powered Air Consumption 40 cfm Air Inlet 3/8 in NPT Air Pressure 90 psi Max Air Pressure 90 psi Min Air Pressure 90 psi Min Hose Size 1/2 in Exhaust Location Bottom Duty Rating General Duty Breakaway Torque 1 440 ft-lb Fastening Torque 1 080 ft-lb Free Speed 6 500 RPM Impact Rated Yes Impact Sound Level 108 dB Impacts per Minute 1 200 Number of Speed Settings 3 Power to Weight Ratio 200 ft-lb/lb Max Bolt Capacity 1/2 in Drive Size 1 in Square