The elegant and easy-to-install mechanical code locks on the door are supplied with a latch lock or with a deadbolt for surface mounting with a recess. By entering the appropriate code, the handle can be operated, allowing the door to be opened. The latch version locks automatically as soon as the door is closed. In the deadbolt version, the deadbolt must be locked manually as soon as the door is closed. On the inside, the door can still be opened mechanically using the handle.