3M 7010328336 is a black back-up pad designed for use with disc sanders and right angle grinders. It is threaded for easy attachment and is suitable for industries such as marine and metalworking. It is ideal for deburring, finishing, polishing, and surface preparation applications. The retainer nut has a thread size of 5/8"-11 and the pad is suitable for use in various sub-industries including builders hardware, medical instruments, metal fabrication, metal implants, plating & polishing, plumbing fixtures, and turbine engines.