Works with all notebooks, desktops, docking stations with built in standard security locking slot hole。Secures your laptop / notebook onto any stationary object [ex. Desk, poles, etc.] and prevent it from theft。The T-bar mechanism bar allows popular utilization of this lock。Simply loop your laptop around a stationary object with the cut-resistant galvanized steel chain。Protect your notebook computer and its valuable data with this affordable computer lock。Color: Silver Instructions For Use：Push the number-adjusting rod of lock inward (the original number is 0-0-0-0 )。Set your secret combination by turning the dials。Decontrol number-adjusting rod and let it to return to the original position。Open the lock again now you new personal code set。Make sure you note your code carefully and check that the lock functions correctly。If you want to change to a new combination ,repeat the above steps。Package includes: Notebook Security Lock*1Notes:1.The real color of the item may be slightly different from the pictures shown on website caused by many factors such as brightness of your monitor and light brightness.2.Please allow slight manual measurement deviation for the data.Support virtual password.