RUBAN Notebook Lock and Security Cable (PC/Laptop) Two Keys 6.2 foot (Black) 6.2 Foot Universal Security Cable. Cable comes with 2 lock keys as an alternative spare. Works with all notebooks, desktops, docking stations with built in security locking slot hole. The T-bar mechanism bar allows popular utilization of this lock. Protect your notebook computer and its valuable data with this affordable computer lock.