TSA APPROVED: The TSA lock is accepted by TSA, allowing TSA inspectors to unlock baggage with an official security screening key. With ZHENGE suitcase lock, you need to lock it again before you can remove the key, so your belongings are always protected. And if the lock is ever opened, the red opening alarm indicator will pop up to let you know as soon as you pick it up at the airport. EASY TO USE: Code setting is easy with the flip-and-set button on the bottom. See the back of the packaging for instructions. High contrast of white numbers on black wheels makes reading easier. Equipped with an advanced dampening device that clicks into place with each dial to improve alignment accuracy. It is an easy-to-use TSA luggage lock that is suitable for both young and old. SAFE ROBUST: The TSA luggage lock 4 digits allows you to set your own combination with 10,000 options. This is ten times more secure than a 3-digit lock. Constructed from high-strength zinc alloy, the TSA combination lock is tough enough to withstand even the toughest luggage conditions. The slide open feature is advanced and unique in the market. It is highly resistant to mechanical and forced unlocking. FLEXIBLE CABLE: The flexible cable can pass through all standard size zippers on suitcase, backpack, duffel bag, briefcase and pelican case etc. With a total length of 5.5 inches, the reinforced cable can connect 2-3 sets of zippers at a time to secure the whole case or bag. It is not only a TSA travel lock, but also a perfect combination lock for gym, school, drawer, tool box, closet, etc.