SAITLAM U Winner Plus is a general purpose flap disc for stock removal and finishing. Zirconium grain on a durable polyester-cotton backing. The conical shape is ideal for working with large surfaces or complex shapes. Type 29 (conical) discs. Used for stainless steel, high-tensile steel, aluminum, copper, brass, and ferrous and non-ferrous metals such as iron, steel, welds, etc.