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...
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.
Locknetics company supplied
electro-magnetic locking devices, electronic smart locks, and electronic
security components to access control dealers and lock smiths.
Ingersoll-Rand acquired ...
All lock cylinders on a specific project are operable by a special "project key". Duplicates of this key may be assigned by the building contractor to workmen and subcontractors as required...