Impact Wrench Power Source Air Powered Air Consumption 22 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 610 ft-lb Fastening Torque 450 ft-lb Free Speed 6 400 RPM Impact Rated Yes Impact Sound Level 107 dB Impacts per Minute 1 320 Number of Speed Settings 4 Power to Weight Ratio 110.9 ft-lb/lb Max Bolt Capacity 5/8 in Drive Size 1/2 in Square