16 inch sanding screens are used primarily with a non woven buff disc on a rotary or automatic floor machine. Their open mesh "screen" construction is designed to prevent loading. The discs can be used wet or dry, they can be rinsed and reused and they are two-sided so can be reversed for longer life. Used for removing varnish or paint from existing floors. Silicon Carbide screens are used on wood, concrete, urethane, marble & stone. 10 discs per box.