If the carriers want to access your luggage, you can use their special key to open the lock and re-lock it when they are done. Multiple Uses: The locks can be used worldwide on a wide variety of items as well as suitcases or cases. They can be used when traveling in a suitcase or backpack, or they can be used at home, school, gym or on your backpack, purse, sports closet, fur case, tool carrying case, golf bag or laptop bag. Easy to Use: The 3-button combination is easy to set and you don't have to worry about keeping your key safe. The push button on the top of the lock means you just select the combination, press the button and the cable will open. The steel cable is easy to use with any latch or hinge. High Quality The body of each lock is made of high-strength zinc alloy and the cable is made of strong, cut-resistant steel. The only way to open the lock is with the special TSA button or by knowing the combination. You can travel safely knowing that your luggage is protected.