Chains are a series of connected links or rings, typically made of metal, that can be used for various purposes. They are commonly used in machinery, transportation, and security. For example, a bike chain transfers power from the pedals to the wheels, while padlocks often use chains to secure items. In addition to practical uses, chains can also have symbolic meanings. They can represent bondage or restriction, as seen in literature and art. Conversely, chains can symbolize strength and unity, such as in the phrase "stronger together," highlighting the importance of collaboration and connection among individuals or groups.