Impact Wrench Power Source Air Powered Air Consumption 25 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 Industrial Duty Breakaway Torque 625 ft-lb Fastening Torque 502 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 107.8 ft-lb/lb Max Bolt Capacity 5/8 in