Kensington K64638WW ClickSafe Keyed Twin Laptop Lock * Security in 1 step: simplified design protects computers and peripherals with a click * Tamper-proof, disk-style lock combined with superior materials provide near-impenetrable protection * Super-strong, steel cable provides the strong physical security * Attaches to laptops, external hard drives or other peripherals via the Kensington Security Slot found in 99 percent of computers * Master keying available * Lock heads measure 12.7mm wide by 31.5mm long * Dual one click lock heads: 3 rotational degrees of freedom * Disc style keying; highly pick resistant * Cables: 5" and 8-inch long, 5mm thick, carbon strengthened * Includes 2 keys