Recently I trade my credit card points for a travel padlock. It's look like a quality lock from Giordano. Did not realize they are into lock since the brand is more famous for clothing
The instruction to set the combination number can be found at the back of the package.
Keep holding down and continue to turn another 90 degrees counterclockwise. Set the combination by turning dials. Turn the shackle back to normal and the setting is completed.
To reset a new combination, repeat the steps as above.
Since this is a TSA (Transportation Security Administration) accepted luggage lock, it allows airport screeners (especially in the US) to unlock, inspect and relock bags without damaging the lock
So far, it is a good luck and no key is required. Just make sure one remembers the combination number