That master lock I’m familiar with, I’ve actually got one sitting on my shelf righ now. I could be mistaken; but I could have sworn those were warded lever locks; needing more than just the tip, but at least one if not two other positions to raise all of the levers as well. Perhaps I was wrong there, they may he even cheaper than In thought (I’ve not actually dissected one as they’re riveted together).

The tubular lockpick is what I posted… So yeah, I’m aware of it and it’s usage…

---

Or you buy the right key, which is what OP did.

This has been my point in this entire conversation. OP didn’t buy some magic ‘universal key’, they bought a regular key that happens to be commonly used. Nothing special.