The master key system is a perfect way to make your office more secure and creats an easy way of controlling which employees can access which rooms. The locks are set to one Master Key giving the owner access to wherever he/she wants, and you can asign specific keys to other people that only have acces to specific locks. In other words, the master key can open all locks, and the change keys can only open specific locks. This system has been used for years and takes a skilled professional to re-key the tumbler twice , and set the pins to match 2 keys. Fidelity Locksmith has been serving many offices in the Los Angeles and Orange Counties to help simplify their offices by introducing the master key system. Not only does it control who goes where but also saves you the pain of carrying around separate keys for separate doors. The master keys fits all. doors. For more information on the logistics of master keys click here. If you want too implement the master key system in your house or office please contact Fidelity Lockmsiths.