TSA APPROVED: The suitcase padlock are accepted and recognized by TSA, which allows the TSA screeners to unlock your baggage for security inspection with an official master key. And with ZHEGE Cable TSA locks, they have to re-lock before removing their key, so your belongings will always be protected. EASY TO USE: The resettable 3 digit combination TSA padlocks allow you to set you own combination with 1000 unique options. Setting and resetting is easy following the instructions which are included at the back of the package. Please note the scale line of this TSA luggage lock is right in front marked with triangles and dots. And NEVER forget your password or the TSA travel padlock will be of no use. SMALL AND SOLID: The small, lightweight TSA approved backpack lock come with a solid, compact body which is made of high strength zinc alloy. It is tough enough to survive even the roughest baggage handling. The hardened steel internal lock mechanism is weatherproof and freeze up even after years of use. FLEXIBLE CABLE DESIGN: The TSA travel cable lock can secure luggage that normal lock shackles simply cant. The flexible cable can thread through all standard sized zippers on suitcase, backpack, duffle, golf or carry on bag, briefcase or pelican case, etc. With a total length of 5.5in, the reinforced cable can link 2-3 sets of zippers at one time to secure the entire case or bag. Besides it is plastic covered and won't scratch your luggage.