TSA Approved: The luggage lock is Travel Sentry approved, allowing transportation security officers to unlock your luggage for security inspection with an official key. If your luggage is already open, the red alert indicator at the top will show to let you know as soon as you crawl it to the socket. Easy to use: adjustment are very easy with the button tilting and adjustable. Large, high contrast white numbers on black wheels for easy reading. Advanced dampening device inside that allows each dial to click into place with better accuracy and code-aligned feel. Secure and strong: TSA combination travel locks 4 resettable digits allow you to set your own code with 10,000 options. The sliding opening is advanced and unique among TSA locks on the market, very resistant to technical and violent unlocking. Flexible cable: the flexible cable (4 mm) passes through all size zippers standard on a suitcase, backpack, briefcase, etc. With a total length of 14cm, the reinforced cable can connect 2-3 sets of zippers at once to secure the entire cover or bag. Not only for a suitcase lock, it is also perfect for gym locker, school, drawers, etc.