How do I know if I have master key?

How do you know if you have a master key?

Any key that can open two or more locks is considered a master key. Many master keys use pin and tumbler locks. For a master key to work, though, there must be something called master wafers inside the lock.

Does every lock have a master key?

Many people think that they have a master key because they have one key which operates many locks in their home. In most cases these locks are just keyed alike and are not on a master key system. If an apartment building has been master keyed, it allows one key to override all the locks in the system.

What is the difference between a master key and a regular key?

Some locks are designed to work with two different keys. The change key will open only that specific lock, while the master key will open that lock and several others in a group.