The DEFCON KL (Key Lock) is a sturdy locking device featuring a 1.82m steel cable, with a pass through loop on one end, and lock on the other end. Any attempts to remove it, will noticeably damage the computer, preventing resale and therefore discouraging theft. The lock utilizes the security slot already built into your notebook computer, and attaches to the notebook using the same method as the DEFCON CL (Cable Lock). The Key Lock also ships with 2 identical keys, giving you the peace of mind of a back-up key.