Impact Wrench Power Source Air Powered Air Consumption 52 cfm Air Inlet 1/2 in NPT Air Pressure 91 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 2 500 ft-lb Fastening Torque 2 065 ft-lb Free Speed 3 700 RPM Impact Rated Yes Impact Sound Level 114 dB Impacts per Minute 540 Number of Speed Settings 4 Power to Weight Ratio 70 ft-lb/lb Max Bolt Capacity 1 in Drive Size 1 in Square