How do locks work in zalanthas?
A modern day pin and tumbler lock would be unfeasible to make and maintain in a metal scarce (need springs) world with so much dust that gets everywhere. Making the small pins and wafers would be difficult as would making the other parts of the lock. I can't imagine any kind of lock other than warded locks being feasible for commoners (with interior metal containing pin and tumbler locks owned by nobles, gmh, and other powerful groups)
(https://media.gettyimages.com/photos/the-bolt-of-this-wooden-lock-is-hollow-and-the-wooden-key-is-inserted-picture-id90742133)
As an example, anyway.