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.The 3M Hookit Gold Abrasive Disc 216U is designed for convenience, combining open coat aluminum oxide discs. This high-quality, coated abrasive product comes ready to use with a pressure-sensitive adhesive (PSA) coating on the backside so it conveniently presses on to the backup pad and removes cleanly, leaving an uncontaminated surface for the next disc.