Does a master key work on every door?

Can you have a master key for different locks?

A master key is a key capable of operating several different locks, each lock being operated by its own separate key (change key). Many people think that they have a master key because they have one key which operates many locks in their home.

Are master keys universal?

Master Keys Set. Occasionally, someone will want the locks they use in their institution, organization etc. to have “mastered” locks. This means that although all the individual locks have individual keys, there's also a “master” key that will open them all. A good example would be in a gymnasium locker room.

Do Master Lock keys work on all Master locks?

A: No. Without the key number, there is no way for Master Lock to know which key will open your lock. There is not a master key that will open all Master Lock products.

Should you have the same key for all doors?

Ultimately, whether you choose to have your deadbolt and door lock open with the same key is your choice. There isn't necessarily a one size fits all answer. If you want to have separate keys for a door that currently uses only one key, it is easy enough for a locksmith to set it up for you.