Strong 10 mm lock head offers uncompromised security for even the thinnest notebooks and devices T-Bar Locking Technology attaches to the Kensington security slot found on most notebooks Extra-strong ultra-carbon steel cable delivers high cut resistance Pivot and rotate ball joint provides superior notebook engagement Also available as a lock system for orders of 25 or more: Master-keyed system: Manufacturer's no. K64433M Single-keyed system: Manufacturer's no. K64433S Like-keyed system: Manufacturer's no. K64433L