Norton Hook and Sand's rugged scrim backing paper sanding disc's embedded loops fasten to the embedded hooks on the sander face, fastening it securely to the tool. Remove the disc when worn or job is complete. Partially used discs can be saved for future use. P-graded aluminum oxide abrasive provides durability and value for dry finishing sanding applications. Heavy-duty paper backing. Water-based zinc stearated (anti-clog) and open coat for reduced loading. Hook and loop backing makes disc changes quick and easy. Fine for finish sanding and cleaning of bare surfaces.