Impact Wrench Power Source Air Powered Air Consumption 41 cfm Air Inlet 1/2 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 1 920 ft-lb Fastening Torque 1 475 ft-lb Free Speed 5 200 RPM Impact Rated Yes Impact Sound Level 111 dB Impacts per Minute 500 Number of Speed Settings 3 Power to Weight Ratio 86.5 ft-lb/lb Max Bolt Capacity 1 in Drive Size 1 in Square