How do keys that open multiple locks work?

How does one key open multiple locks?

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. When the master wafers line up, the key and lock can turn freely.

How do multi key locks work?

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. In these locks, a few of the pin pairs are separated by a third pin. This third pin is called a master wafer or spacer.

Is there a key that can open all locks?

A skeleton key (also known in North America as a passkey) is a type of master key in which the serrated edge has been removed in such a way that it can open numerous locks, most commonly the warded lock.

What do you call a key that opens many locks?

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.