You can choose how you want your locks to be keyed for fireproof doors.
•Keyed Alike: If you buy more than one lock, they can all work with the same key.
•Keyed Different: Each lock will have it's own key that will not fit the others.
•Non Keyed: Select this option for non keyed Functions (Ex: Privacy. Passage, Dummy)
Also see: Lock Keying for information of Master keying and other options.