3M™ Hookit™ Gold Discs 216U are used for rough featheredging, or for final sanding of plastic filler and putty. These discs are precision coated with high quality minerals and resins to deliver longer-lasting discs that cut through a variety of surfaces, including paint, primer, fiberglass, metal and SMC. 3M™ Gold Abrasives produce uniform, consistent finishes and are available in both 3M™ Stikit™ Attachment and 3M™ Hookit™ Attachment options for convenience and reuse.