Product Description 3M Disc Retainer Nut securely fastens a fiber disc to a disc pad hub or face plate for use with a rotary power tool. This nut is made to fit 3M disc hubs and face plates, but also fits fiber disc holders from other manufacturers. From the Manufacturer The 3M™ Disc Retainer Nut securely fastens a 7/8 inch center hole fiber disc to a 5/8-11 disc pad hub or face plate for use with a rotary power tool. The nut is made to fit all 3M disc hubs and face plates, and also fits fiber disc holders from other manufacturers. It is compatible with 1-1/4 inch spanner wrench with 1/4 inch pins. For more than a century, 3M has applied innovation and technology to improving our customers’ lives and supporting their business goals. Today the company, from its headquarters in St. Paul, Minnesota, serves industrial and commercial customers and consumers in nearly 200 countries. Abrasive Systems products, including a complete line of coated abrasives, microfinishing and microreplicated abrasives, and hardware accessories, provide the finishing touch for almost any surface conditioning application. The 3M brand, across thousands of products, represents consistency, superior quality, and value.