This is a metal double chain, typically used as a wallet chain or a pocket watch chain (Albert chain). Main Features and Uses: Design: A double chain design with two chains overlapping, featuring a snap hook (carabiner) at the end. Uses: Wallet Chain: Connects a wallet to a belt loop, preventing loss or theft, and also serves as a fashion accent. Pocket Watch (Albert Chain): A traditional accessory used to secure a pocket watch by attaching it to a buttonhole on a vest. Length: Approximately 81cm Please note: As I am not a professional, there may be some slight measurement errors. This is a used item, so please understand. The product packaging may be reused from existing materials. Thank you for your understanding. I hope to have a smooth and pleasant transaction with no issues. Thank you for viewing.