Designed for use with a random orbital sander, 3M gold paper discs are made with aluminum oxide abrasive grains on a light A-weight paper backing that's 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 discs well-suited for general sanding and finishing on paint, primer, wood, metal, plastic, and fiberglass. Discs come ready to use with a pressure sensitive adhesive coating on the backside so they conveniently press on to the backup pad. Clean removal leaves an uncontaminated surface for the next disc. Note: Disc should be used in conjunction with a Stikit backup pad (sold separately). 6" diameter.