Locksmiths had trouble answering this riddle! Which lock opens everything?

Are you smarter than some of the professional locksmiths? Then you will give us an answer on which lock opens everything on the image posted below. You can take your time to think about which lock actually opens everything but if you want to accept our challenge, take 5 minutes of your time to think hard and give us the answer right away on which lock opens everything once unlocked without hesitation if the answer is really correct or actually wrong.

The answer to which lock opens everything?

The correct answer is all of them.

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