Small Format Interchangeable Core

While there are several different size cores used by different manufacturers, the “Small Format” size core is very common and can be interchanged without changing existing hardware. Manufacturers that make SFIC cores include Best, KeyMark, Everest, Arrow, Falcon, Videx

Non-SFIC include: Medeco, Yale, Schlage, Sargent, Corbin Russwin, Primus