Cable locks are security devices used to prevent the theft or unauthorized use of objects. They are so named because they usually feature a pliant cable connected to a combination or key-accessible locking mechanism, and they are commonly used to secure personal property.

Cable locks are usually composed of twisted or braided strands of metal wire. They are also often shielded from the elements by polymer coatings, such as rubber or plastic. This shielding makes the rusting of the interior metal strands less likely, and it also serves to prevent injury or discomfort to users during handling. Cable locks are characterized by their ease of use and versatility; they can be used to secure all kinds of objects in a variety of settings. Because cable locks are commonly used in consumer products contexts, they are often made to meet specifications of visual appeal as well as practical utility. They can be made available in a variety of colors, materials and lengths, and they can be designed for use with a wide variety of products. They can be used to secure bicycles, computers, patio furniture, outdoor sports equipment, video projectors, trailers and a wide variety of other objects.
Typically, cable locks offer a high resistance to various cutting techniques even though they are often smaller and lighter than other locks. Generally speaking, the thicker the cable lock, the greater its resistance to breaching equipment. However, cable locks are often more easily breached than pad locks or other kinds of locks made of more durable materials. For this reason, cable locks are not necessarily the best choice as a long-term or permanent security measure. When employed in appropriate applications, cable locks offer many benefits to their users. They are small, lightweight, easy to use and can be less expensive than U-locks and other, heavier-duty lock varieties. They also act as a visible theft deterrent. In order to decrease the likelihood of breaching, cable locks are often made of strong materials, such as steel. They can be made to varying specifications of strength and thickness. For example, a cable lock used to secure a computer does not need to be as long or as thick as a bicycle lock. Because of their versatility, the variety of ways in which they can be configured and their economy, cable locks have become some of the most popular locking utilities.