6C cores have two lugs. The standard control lug is modified and renamed the operating. Lug and an additional lug, located in the back of the core, is used to.
Retain the core and keep it from sliding out of the 4S housing. Additionally, 6C cores are combinated in reverse to standard SFIC. The control key is pinned to what is usually the operating shearline. As such, you must have both the control and operating key to install the 6C core into 4S housings. Please reference Photo #2 of this listing for visual representation of core operation.
All cores in this listing are keyed alike. Plug holders are used for display purposes only and are not included in the sale. Thanks for your business with SFIC Lock Solutions! Please reach out if you have any questions before ordering.