3M SandBlaster 9678 Multi-Layer Grinding Disc, 36-Grit, Coarse Grade, Cubitron Mineral, 4-1/2 in Dia

For use on wood, metal and fiberglass, shapes and finishes in one step, fresh abrasive is exposed with use, ensuring a sharp cut every time, 4 in fits 4 in angle grinder, 4-1/2 in fits either 4-1/2 or 5 in angle grinder, must be used with Quick Loading Adapter 9675 (287.2901).