An item on a chain is an object that is attached to a chain and can be worn around the neck or wrist. The most common items on a chain are a MONOCLE, an ID tag, a pwatch, and a pocketwatch. A MONOCLE is a single lens used for vision correction or magnification. An ID tag is a small metal or plastic tag with identifying information such as name, address, or phone number. A pwatch is a type of watch that is worn on the wrist and is powered by a battery. A pocketwatch is a type of watch that is kept in a pocket and is powered by a mechanical movement.