TSA APPROVED: The suitcase locks are Travel Sentry Approved, which means transport security officers can use an official master key to unlock it without any damage. With this ZHEGE TSA suitcase lock, they have to relock to retrieve the key after inspection; and if your luggage is ever opened, a red alert indicator will pop out at top, to let you know as soon as you pick it up at the airport. EASY TO USE: Code setting is super easy with a fliP-and-set button at bottom. Instructions are included right at the back of package. Big white numbers are easy to see even with low light, quite friendly for the senior and red-eye flight travelers. A damper device is equipped inside to make each of your dialing click into place with better accuracy and feeling. SECURE & SOLID: The resettable 4 digit combination padlocks allow to set your own code with 10,000 options, 10 times harder to crack than a 3 digit. The luggage lock body is made of high strength zinc alloy, tough enough to survive even the roughest baggage handling. The feature opening by sliding is advanced among luggage padlocks on the market, highly resistant to technical and violent unlocking. FLEXIBLE CABLE DESIGN: The flexible cable (5.5in, 4mm) can threads through multiple of zippers on suitcase, backpack, briefcase, laptop, duffle, golf and gym bag at any awkward angle and at one time. Just double loop if you are afraid the opening is too large. Not only a padlock for suitcase, it is also good locker padlocks for gym, school, drawers, toolbox, cupboard, cabinet, etc.