A metal keychain is a small accessory that can be attached to a key or a key ring. It is made of high quality of zinc alloy, which is a metal that is durable, corrosion-resistant, and shiny. A metal keychain can be used to promote businesses by printing or engraving their logo, name, slogan, or contact information on it. A metal keychain can also be used as a souvenir, a gift, or a personal item. A metal keychain can have various shapes, sizes, colours, and designs to suit different preferences and purposes. You can find some examples of metal keychains in these web search results.