THE MOST DURABLE LOCK ON THE MARKET. SureLock uses an ultra tough alloy body to protect our locks from the harshest of baggage handling. Our hardened stainless steel internal lock mechanisms won't rust or freeze up even after years of use. Put our locks to the test. We back them with a complete money back guarantee. PEACE OF MIND WITH AN INSPECTION INDICATOR. Know if your luggage has been inspected as soon as you pick it up at the airport with our pop-up inspection indicator. If the TSA has opened your luggage, a button will pop out of the top of the cable lock. You'll know to double check your luggage to make sure nothing has gone missing while you're still at the airport instead of at your hotel or final destination. EASY SET COMBINATION MECHANISM WITH FOUR DIGITS. Setting your combination literally takes less than ten seconds and the use of four digits means that your combination is harder to crack and easier to remember. In addition to this, you can change your combination as many times as you would like. This lock can be used in gym locker, school locker, office lockers and they are also great for escape room, tool boxes, gun cases, golf case. A SECURE LOCK WHICH WORKS WITH NEARLY ANY KIND OF LUGGAGE. The standard size of the steel shackle loop on luggage locks is 21.67mm. We decided to lengthen the shackle on these locks to 25.67mm. This allows them to better fit hard cases such as Pelican or gun cases. EASY TO READ DIALS. SureLock uses a white numeral on a black background for our combination dials. These high contrast dials make reading your combination a breeze. No more squinting or searching for glasses as you try to open your locks.