Standard Pack = 1 piece(s). Air Inlet Size=1/4 NPT; Average Air Consumption=6.5 CFM; Brand Name=Universal Tool; Exhaust Type=Side; Features=Safety lock-off throttle, Air cooled gears, Ergonomic grip, Exhaust silencing, Left or right handle positions, Best for heavy duty surface prep and material removal; Free Speed RPM=11000; HP=1.3; Model Number=UT8785-4; Spindle Thread=3/8-24; Style=Right Angle; Wheel Size=4;