MicroSaver keyed ultra lock for notebooks and computer devices and added an ultra thick 8mm carbon strengthened steel cable for even greater security and peace of mind. Patented T-bar locking mechanism provides the most secure connection to your notebook. Lock contain built-in defense system guards against lock tampering and low profile lock heads won't block notebook ports or lift notebook off desk. Online key code registration to replace lost keys and safe pro tested for security and peace of mind.