Kensington K64598US MicroSaver Keyed Laptop Lock Hidden Pin technology ensures tubular lock cannot be picked T-Bar Locking Technology attaches to the Kensington Security Slot found on virtually all laptops Carbon steel cable is cut-resistant and anchors to desk, table or any fixed structure Register & Retrieve program allows you to order replacement keys. The Kensington Security Slot has been the industry standard since 1990