Special executions

KD KEYED DIFFERENT 

Each door is opened by its own dedicated key

MK MASTER KEY 

All doors, each supplied with its own dedicated key, can also be opened by one master key (MK)

MASTER KEY GROUPS (MKa, MKb, MKc)  

Several groups of doors with their own dedicated keys (KDa, KDb, KDc) can also be opened by one master key for each group (MKa, MKb, MKc)

GENERAL MASTER KEY GMK 

All the doors making up these groups can be opened by a single general master key (GMK)

It is also possible for all or some of the keys illustrated above to open a common entrance door, thus forming a central cylinder system (CC).