Do all master locks use the same key?

Are all master locks keys the same?

In a Master Keyed system, a master key opens all the locks in the system although each lock also has its own unique key.

Do any locks have the same key?

It's easy to spot locks that are keyed alike. "Look right on the box and find a particular key number," Boddie said. For example, locks by Schlage with the Number 10239; one key can open four locks. Kwikset is another popular brand that uses the same method with their packaging.

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.