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 Industrial Duty Breakaway Torque 1 920 ft-lb Fastening Torque 1 550 ft-lb Free Speed 5 000 RPM Impact Rated Yes Impact Sound Level 111 dB Impacts per Minute 650 Number of Speed Settings 4 Power to Weight Ratio 84.6 ft-lb/lb Max Bolt Capacity 1 3/8 in