Diablo DCP045VGPS01G Grinder / Sander Conversion Kit, 4-1/2" Dia, 5/8" ArborDiablo's grinder sander conversion kit converts your angle grinder into a sander. Use this kit when switching from a grinding wheel to a fiber disc. All components necessary to begin polishing are included in this kit: back up pad, locknuts and fiber discs. Diameter: 4 1 2" Arbor: 5 8" RPM: 13250 Materials: Metal Converts your angle grinder into a sander Includes (1) back up pad, (1) 5 8 11 locknut, (2) 50 Grit (Coarse) fiber discs.