difference between core and control key

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For all Schlage and Falcon small format interchangeable cores shipped from the factory 0-bitted, the control key will be cut to all 4's.
There are several ways to spot differences, see Figure 1, but the easiest is to look at the face of each core. The face of both cores looks like a "figure 8".  With small format, bo...
A lock specified by a cylinder suffix BDC will be supplied with a disposable small format construction core, see Figure 1 below.  There is no metal key but instead the BDC cylinder has a ...
A small format disposable core is used as a SFIC construction core that is for low security applications and can be thrown in the waste bin after use.
All of the Everest D sections/keyways are restricted.
Choose the appropriate full size control key from the selection below.
Classic Conventional Key Blanks and Cut Keys Part Number Description Key Blanks 35-056 Control Standard bow, embossed both sides 35-076 Standard bow, unembossed both s...
A zero bitted Falcon SFIC core is combinated for the control key to be cut at all 4's.
A control key is required to install or remove an interchangeable core from a housing or lever. The control key is identified by having "CONTROL" stamped on the bow. How to install and remove an i...
The lever may be missing the slot feature for the core locking lug.  Verify slot is in place.