Use this Merit Ceramic Alumina Plus C/A coarse grit TR (Type III) quick-change cloth disc for weld blending, stock removal and deburring of various hard and soft metals. A two-ply Y-weight polyester backing provides lasting strength, while the ceramic alumina blend abrasive ensures the disc outlasts similar aluminum oxide and zirconia discs. Work on hard-to-grind materials for longer periods thanks to the disc's advanced self-lubricating grain treatment, which keeps it cooler during cutting.