5"x8 hole Assorted pack hook & loop Eclipse Film Non-Loading Stearated heat treated aluminum oxide sanding discs. An excellent all-purpose Disc with a fast cut on a durable yet flexible Film backing. Can be used for raw wood, paints, primers & finishes, composites, fiberglass and metal. Sun gold Abrasives have been manufacturing coated abrasive products for over 40 years. Can be used for sanding of wood, metal, composites, finishes, paint.