Description Reception: 1″ Drive Working Torque Range: 200-2268 ft-lb (271-3100 Nm) @ 90 PSI | 200 -258 FT-LB (271-3500 Nm) @120 PSI Max. Torque: 2345 ft-lb (3180 Nm) @ 90 PSI | 2802 ft-lb (3800 Nm) @ 120 PSI Sound Pressure / Power: 100.5 /101.6 dBA @ 90 PSI | 103.2/104.3 dBA @ 120 PSI Free Speed: 4100 RPM @ 90 PSI | 4600 RPM @ 120 PSI Impact Per Minute: 625 @ 90 PSI | 740 @ 120 PSI Ave. Air Consumption:  15 CFM (427 L/min) @ 90 PSI | 20 CFM (560 L/min) @ 120 PSI Ave. Air Consumption @ Load: 51 cfm (1430 L/min) @90 PSI | 73 cfm (2040 L/min) @ 120 PSI Air Inlet NPTF: 1/2″ Min. Hose Diameter: 1/2″ (13 mm)