Air Impact Wrench Power Source Air Powered Air Consumption 14 cfm Air Inlet 3/8 NPT Female Air Pressure 90 psi Max Air Pressure 90 psi Min Hose Size 1/2 in Duty Rating General Duty Breakaway Torque 1 450 ft-lb Fastening Torque 1 300 ft-lb Free Speed 5 500 RPM Impact Rated Yes Explosive Environment Rated No Impact Sound Level 105.3 dBA Impacts per Minute 1 075 Number of Speed Settings 4 Power to Weight Ratio 227.3 ft-lb/lb Max Bolt Capacity 1 in Drive Size 3/4 in Square