The Metabo Fleece Compact Polishing Discs "Unitized" (626417000) are designed for cleaning and polishing surfaces, as well as smoothing weld seams. They are made of compacted fleece material on a fiberglass disc, which helps reduce the number of working stages required. These polishing discs are suitable for alloy and high-alloy steels, colored and light metals, chrome and nickel steels, titanium, and steels