The 3M™ Stikit™ Gold Paper Disc Roll 216U is designed for convenience, combining an open coat aluminum oxide abrasive with a handy adhesive backing ready for quick attachment to a 3M™ Stikit™ Backup Pad (sold separately). The 3M™ Stikit™ Gold Paper Disc Roll 216U makes the discs easy to grab while eliminating the use of disc liners.Designed for use with a random orbital sander, 3M Discs are made of long-lasting aluminum oxide abrasive grains constructed on a light A-weight paper backing, making them suitable for lightweight sanding and finishing. The open coat and load-resistant coating help prevent loading for a longer service life, and make 3M Stikit Gold Paper Disc Roll 216U discs well- suited for general sanding and finishing applications on a variety of substrates, including paint, primer, wood, metal, plastic, and composites, including fibreglass.