Features: -Suitable for grinding, cutting, polishing, milling, deburring, and roughening. -The 400 mesh non-woven scouring disc is used for grinding stainless steel, nickel alloys, titanium, etc., and can remove marks, burrs, etc. -The 80 mesh disc (2 inches 50mm) are suitable for surface finishing, deburring, chamfering and polishing of automobiles, motorcycles, metal stamping parts, die castings, instruments and meters, bicycles, etc. -The wool disc is used for polishing various materials such as glass, ceramics, stone, metal, plastic, jewelry, etc. Specifications: Color: silver Size: 160*77mm/6.3*3.03in Material: metal .