difference between control key and change key

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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...
The Schlage full size construction control key part number is 48-056-ICX.  The ICX suffix will change depending on if the key is for a new job or existing job.   New jobs: Specify "ICX"  E...
Von Duprin Hydraulic Damper Since transitioning in February 2014 to a new hydraulic damper, Von Duprin is announcing the use of another alternative design. Despite the small design differences, t...
On June 2, 2020 the spring cage on the ND series dummy functions changed design from a assembled machined spring cage to the new single cast spring cage.  See pictures here : C...
Key-in-lever tailpieces differ in length depending on the lock series, function, and design.  Click here to identify the tailpiece and length.  NOTE: Modular cylinders use...