The PORT-Noteworthy DEFCON CL (Cable Lock) is the only system that combines a galvanized steel cable with a high quality 4 digit re-settable combination lock designed to fit the security lock of most notebook computers. The DEFCON CL weighs only 6.2 ounces and is perfect for travel. With over 10,000 user-settable combinations, this keyless notebook computer cable lock eliminates the possibility of losing a key. Simply secure your notebook computer to an immovable object and your DEFCON CL will deter thieves from trying to steal your notebook.