Designed with the 3 wheels and 0-9 number each wheel, you can set your own password, and the lock can be preset at factory to open at 0-0-0. It is used widely to lock the luggage, jewelry boxes, tool chests, mini suitcase and other private boxes..Can Easily Set or Reset a Personal Combination Code.Recognized by the TSA (Transportation Security Administration).TSA Agents Never Leave Your Bags Unlocked After Inspections, Because They Cannot Remove The Key Without Relocking It. So You Can Keep Belongings Safe After TSA inspection!