Kensington MicroSaver Ultrabook Laptop Keyed Lock: * Slim enough to work on even the thinnest Ultrabook * Rotating head and pivoting cable for easy lock attachment and removal * Includes attractive K-slot adapter for MacBook Air and Ultrabooks lacking a K-slot * Patented T-bar locking mechanism for superior strength * Cut-resistant 6" carbon-strengthened steel cable * Nearly impenetrable disk-style locking mechanism * Free online key registration for secure key replacement * Compatible with Ultrabook and MacBook laptops