Free Speed(RPM):2200 Chuck Size:3/8” Motor:0.4 HP Air Inlet:1/4” NPT Hose Size(I.D.):3/8” Rec. Air Pressure:90 PSI Avg. Air Consumption:0.38 M3/MIN Overall Length:7 3/4” Packing:10PCS/13KGS/0.67’