Able to be used in place of revolving handles, long shoulder type GN 319.5 Revolving Ball Knobs with 303 stainless steel tapped shoulder (matte shot-blasted finish) come in inch and metric sizes. Tapped shoulder allows revolving ball knob to be mounted from underside via screw or bolt, which can then be mounted to sheet metal of various thicknesses, flat bar, or castings to create cranking or turning mechanism. RoHS-compliant construction also features black phenolic plastic hand piece.