A 6.2 Foot Universal Security Cable.. Works with all notebooks, desktops, docking stations with built in standard security locking slot hole. The T-bar mechanism bar allows popular utilization of this lock. Protect your Laptop/Notebook and its valuable data with this affordable computer lock.Installation: Determine if your laptop is compatible with a laptop lock by looking on the side or back of your computer to see if it has a Universal Security Slot (USS). The USS is a round hole that is typically located on the side of your laptop, but may also be located on the back of some models. Unpack your laptop lock from the packaging and remove the twist tie around the cord. Attach the security cord to a stationary object by wrapping the cord around a thin portion of that object and inserting the lock through the looped end of the cable. A heavy table or desk leg works well for this purpose. Make sure the stationary object you choose is heavy enough that a thief can not easily lift it to remove the security cord.Push the head of the laptop lock firmly into the Universal Security Slot (USS) until you hear a click. Once the lock is inserted into the USS, you will not be able to remove it without entering the combination. Remove the lock by setting the combination. Set your combination by adjusting each wheel until the correct number is displayed on the front of the lock. Most combination-based laptop locks require four numbers.