Villa Park Locksmiths Residential Master Key Lock Villa Park, IL
What is it?
Have you ever observed your building supervisor carrying around a key that could unlock every house in the event of an emergency? This is called the master key. The system allows owners to wield a single key that can access all the locks within a premise. This system can be further expanded into a sub-master system that would act as a subordinate to the master and can access a limited number of locks.
