Metabo's 6" P80 Convex Ceramic Flap Discs (10 Pack) (626489000) are designed with fins that are rounded off towards the outer edges, for better processing of fillet welds. These discs also cut cool, have a very high cutting output and grind with low vibration. They are ideal for extreme grinding jobs like processing high-alloy steels, titanium alloys, nickel-based alloys as well as chromium and chromium-nickel steels, brass and bronze.