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 700 ft-lb Fastening Torque 553 ft-lb Free Speed 9 000 RPM Impact Rated Yes Impact Sound Level 105 dB Impacts per Minute 1 400 Number of Speed Settings 3 Power to Weight Ratio 159.1 ft-lb/lb Max Bolt Capacity 1/2 in