Great Grand Master Key Arrangement:
In the diagram above
The locks are operated individually by separate keys. (K1 = D1, K2 = D2....)
The sub master keys (SMK1, SMK2...) operate a small group of locks.
Grand Master key (GMK1, GMK2...) & Master key (MK1, MK2...) open certain set of locks and Grate Grand Master key (GGMK) Opens all the locks in the system.
Example:
Master keys Can be used Floorwise
Grand master key can be used for Building.
Grate Grand Master can be used for whole project.
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For Grate Grand Master key system just call or write an inquiry.