:Each core from Corbin-Russwin is removed and reinstalled via a partial two-chambered pin section with a unique shear line that rotates into and out of the chassis when any common change key or master key with the proper cuts is encountered, and, therefore, is incompatible with all Schlage removable cores, which release and resecure by means of a lateral pin at the back that is controlled by a specialized key cut to match any functioning change key or master key or combination thereof.
