A cable lock is a security device used to protect items like bicycles, tools, or outdoor equipment from theft. It consists of a long, flexible cable made of strong materials, often coated to prevent scratches. Users can loop the cable around their belongings and secure it with a lock, making it difficult for thieves to steal the items. These locks are popular among cyclists, as they are lightweight and easy to carry. While they provide a good level of security, it's important to choose a high-quality cable lock, as some can be cut easily. For added protection, many people use a U-lock in combination with a cable lock.