Impact Wrench Power Source Air Powered Air Consumption 40 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 1 400 ft-lb Fastening Torque 900 ft-lb Free Speed 4 200 RPM Impact Rated Yes Impact Sound Level 121 dB Impacts per Minute 1 080 Number of Speed Settings 3 Power to Weight Ratio 47.1 ft-lb/lb Max Bolt Capacity 1 1/4 in