Keychains are small, decorative items that are attached to a keyring, making it easier to keep track of keys. They can be made from various materials, including metal, plastic, and leather, and often feature designs, logos, or charms. Keychains serve both functional and aesthetic purposes, allowing individuals to personalize their keys while also providing a convenient way to carry them. In addition to holding keys, keychains can also be used to attach other small items, such as flash drives or miniature tools. Some keychains even come with added features, like bottle openers or LED lights, enhancing their utility. Overall, keychains are popular accessories that combine practicality with personal expression.