keyed alike locks change key

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When you want to periodically disable and block access to a certain room in a building or an entrance door, that’s when you would need to use a Lockout Cylinder. See full document.
Two change or user keys are supplied with each lock.
Von Duprin does not supply cylinders keyed alike.   Cylinders keyed alike are available from Schlage and Falcon.
Conventional Cylinders - A conventional cylinder is one that requires some breakdown of the lock in order to be removed. These are the most commonly used cylinders sometimes called key-in-lever...