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.
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...
(Small Format Interchangeable Core is a small format cylinder core which can be removed from one housing and placed into another lock without removing or disassembling the lockset/door hardware.