Keychain, also known as keychain, key ring, key chain, key hanger, etc. The materials for making keychains are generally metal, leather, plastic, wood, etc. This item is exquisite and small, and the keychain is a decorative item hung on the key ring. Choosing to match the key with your favorite keychain can not only reflect your personal mood and personality, but also show your taste and bring yourself a happy mood. Keychains have a variety of shapes, such as cartoon shapes, brand shapes, simulation models, etc. The materials are generally copper, aluminum, rubber, plastic, etc., and now they are mainly zinc alloy surface with nickel or rhodium and other anti-rust elements. The keychain has now become a small gift.