Is there anything like master key?

Is there such a thing as a master key?

A master key is a key that opens several different locks, related in some way, within a master key system. For example, an elementary school may have a master key which will open all classroom doors. Classroom doors would each also be opened by a key which would only open that one classroom door.

Is a master key the same as a skeleton key?

Although a skeleton key is a “master key,” not all skeleton keys are the same. The size and cut of the key's bit, as well as the diameter of its barrel, determine whether it fits with a lock. Additionally, antique (or reproduction antique) skeleton keys are known for their intricate details.

Is there a key that can unlock any door?

A bump key can open any lock that it fits into. It's helpful to have in your pocket if you ever lose your keys, because it can open your door lock and your deadbolt, even if they normally require seperate keys. I keep mine in my wallet.

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.