Luggage locks can help keep your possessions from going astray. But they can turn on you, too, if you forget the combination.

When it comes to flying with checked bags, keeping your luggage protected from ... should work — and press the "Reset" button ...

so it may make more sense to try to reset the lock using other methods first. Before purchasing a TSA master key, you'll need to take a look at your luggage to confirm the key will work with its lock.