Yeah, it’s hard to judge how much the gap between beginner and them. I remember there’s one where LPL doing some seminar, I was like “He’s an actual lawyer???” like I can’t believe the locksmithing part is just his hobby or something.
Except master lock
“You can open master lock with another master lock”











As you said, it’s ten bucks for a decade.
I’ve use mine for years with no issue, and if any it’s my fault not the domain.