The DEFCON Serialized TrapEZoid Combo Cable Lock is a sturdy locking device with a pass-through loop on one end and a lock on the other. The 6.5-foot durable galvanized steel from which the cable is constructed is both cut- and rust-resistant so that it's nearly impossible to destruct. And if someone attempts to remove the lock, it will noticeably damage the computer, alerting you to potential theft and preventing resale.Each lock is assigned a unique combination and serial number. The small form factor is easy to travel with and keeps out of the way while in use. This lock is ideal for use in the office, at school, dorms, hotel rooms, or other highly populated areas where your laptop could be at risk.