Impact Wrench Power Source Air Powered Air Consumption 13 cfm Air Inlet 1/4 in NPT Air Pressure 90 psi Max Air Pressure 90 psi Min Air Pressure 90 psi Min Hose Size 3/8 in Exhaust Location Bottom Duty Rating General Duty Breakaway Torque 90 ft-lb Fastening Torque 65 ft-lb Free Speed 9 500 RPM Impact Rated Yes Impact Sound Level 108 dB Impacts per Minute 1 400 Number of Speed Settings 4 Power to Weight Ratio 42.9 ft-lb/lb Max Bolt Capacity 3/8 in Drive Size 3/8 in Square