3M floor edger discs offer great productivity and value on bare wood or nongummy finishes. They cut faster, run cooler and last longer than conventional discs. The discs feature the familiar purple Regalite mineral, and tough paper backing.3M Resinite Floor Surfacing Discs are precut. Sharp, fast cutting synthetic mineral with a tough, flexible paper or combination backing. These discs save time and deliver a better value, better finish, and longer life.