Master key system

Master key system (MK-system)

Master key systems are those locking systems in which all cylinders that occur can be locked with a common key (master key).

1. Example

The following closures can be seen in the 1st picture:

  • keys S.1 to S.10 close the corresponding cylinders (doors) Pos. 2 - Pos. 10
  • key S.1 closes all cylinders (master key)
  • the number of the respective keys does not play a role
Master key systemMaster key system

2. Example: C/MK system (central master key system)

The following closures can be seen in the 2nd picture:

  • in addition to the 1st example, all existing keys also lock the central areas: front door and cellar door
  • as in the 1st example, there is one master key that closes all cylinders
  • Note: If the master key is to lock the apartments, you should have written consent from the tenants. We assume the presence of this consent in the production of locking systems!
Central master key systemCentral master key system