Remove rust, clean welds and strip paints, varnish and other coatings with the Zirconia Flap Disc. It’s made from a zirconia alumina grain that provides an enhanced material removal rate in metal and wood grinding applications, whilst also boasting self-sharpening properties. This Flap Disc’s generates a high removal rate on edges, weld seams and other small work surfaces. The fan-shaped design produces a uniform scratch pattern on surfaces, which eliminates the need to rework them.