DEFCON CL Notebook Computer Cable Lock Grey. Nearly 1,000 notebook computers are stolen everyday - protect your notebook computer and its valuable data with this affordable security product - the DEFCON CL. The Targus DEFCON Combo Lock (CL) is 6.5 feet of cut-resistant, galvanized steel cable that loops around any secure object and easily attaches to your notebook's lock slot. Our DEFCON CL features a user-settable combination lock with up to 10,000 possible settings.