No precision mechanics nor probably foolproof, but perfect for a changing room locker.
== Well, we must first find the stuff ==
- Roder and lubricate the lock to work properly it (with a silicone lubricant beast odorless and less yucky a penetrating oil, especially in a bag with clothes) Basically, after an evening spent to repeat the combination, quiet during a movie. Very good exercise to store.
- To open, pull dry and straightforward. At first I thought the combination was wrong, but no, this lock is rustic, that's all.