Metal zippers are fastening devices made from metal components, typically used in clothing, bags, and other fabric items. They consist of two strips of fabric with interlocking metal teeth and a slider that moves up and down to open or close the zipper. Common metals used for the teeth include brass, aluminum, and stainless steel, which provide durability and strength. These zippers are known for their longevity and resistance to wear, making them a popular choice for heavy-duty applications. They are often found in items like jeans, jackets, and luggage, where a reliable closure is essential. Metal zippers can also add a stylish touch to various designs.