The term KEY RING ITEM can be summarized as a small object that is attached to a key ring. The most common example of this is a FOB, which is a three letter acronym for 'Fobus Obscurum', a Latin phrase meaning 'hidden key'. FOBs are typically made of metal or plastic and are used to store keys, access cards, or other small items. They are often used as a security measure to prevent unauthorized access to a building or vehicle.