Diablo's Steel Demon Grinding and Polishing Flap Discs grind and polish simultaneously to help you scale down and smooth out metal and stainless steel surfaces. Featuring X-Lock, these flap discs can be changed quickly, without the use of tools. A conical shape and 80-grit (medium) composition combine for 10X faster material removal, leaving behind a shiny surface that gives your work piece a revitalized appearance and/or operational resurgence. Designed to be backwards compatible, these discs work with X-Lock angle grinders and 7/8 in. arbor angle grinders when grinding and polishing metal materials.