In locking systems, cylinders are often required that are to be locked by several keys (user groups).
Explanation for example:
- Pos. 1 (double cylinder) is the central cylinder
- all keys (p.1 to p.5) can open this cylinder
- central cylinders are mostly front door, yard gate, basement or floor cylinders
- In GHS locking systems, there can be several central cylinders for different user groups.