Chuck size, free speed 6000 rpm, 1 hp, keyed drill chuck type, 6 average cfm 15 second run time, 29.8 Cfm full load, required pressure 90 psi, air inlet 1/4 in. Hose size 3/8 in, aluminum handle material, yes variable speed, trigger throttle type, reversing no, ball bearing ...Chuck size, free speed 6000 rpm, 1 hp, keyed drill chuck type, 6 average cfm 15 second run time, 29.8 Cfm full load, required pressure 90 psi, air inlet 1/4 in. Hose size 3/8 in, aluminum handle material, yes variable speed, trigger throttle type, reversing no, ball bearing bearings, aluminum housing material, planetary gear train, overall length 7-1/8 in, tool weight 2.2 Lb, includes chuck key.