heavy duty balanced ball-bearing constructionautomatic release throttle leverlocking abrasive clamp for positive sand paper retentionconstant 3/16” stroke for a smooth, fine finishorbital stroke (mm) : 5free speed (rpm) : 8,000avg. air consumption (cfm) : 4air pressure (psi) : 90air inlet (npt) : 1/4"hose size (id) : 3/8"