Cleaning: specially designed for cleaning, oxide elimination and surface finish of a variety of materials to create a soft, satin or matte versatile finish: suitable for use in materials such as gold, silver, bronze, copper, brass, aluminum, aluminum, aluminum, Stainless steel, cast iron and soft metal detailed cleaning: these brass brushes are very effective on flat surfaces and in difficult places to reach, such as slots and slots, since the brass wire does not produce sparks and is softer than the wire of steel