Master key systems are needed to control the entry to the property. Master key systems consist of locks that have special tumbler pin configuration. This special configuration works that way so one key can open certain lock and only one master key can open all locks in the system. Master key systems should be designed in the way so they meet the security needs of the property. There are some very complicated master key systems that have a grand master key for all locks and some master keys separate for specific group of locks. Serrurier shay locksmith provides consultation, planning, sale, installation, keying, rekey, repair, and lockout for variety of master key systems. Please call us for free estimate, consultation and design of your master key system. We could create master system on any key brand either for 2 doors or 100 doors, up to client demand.