These locks are lockable with key but we also have magnetic locks, housing locks, black locks, ...
When selecting a lock, pay attention to the dimensions of the counter plate, the axle size and the mandrel.
These are the 3 most important dimensions that you have to take into account.
Axle size = middle square hole for the door handle pin to the middle of the lower opening (key, cylinder or toilet).
Mandrel = the distance from the counter plate to the center of the square hole of the door handle