1.360 degree freely slide. 2.sound light 3.with white pads to prevent slipping 4.though holes can be fixed. 5.high loading. Material: aluminium360 degrees swiveling for display equipmentsOuter diameters: 8``,9``,10``,12``,14``,16``,18``,20``,24``Through holes can make customer's requirements to be fixedColor:black stoving varnish