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Are Interchangeable cores compatible industry wide?

There are two types of interchangeable cores:

  • Full size interchangeable cores - referred to by Schlage as (FSIC) also known by other manufacturers as Large Format Interchangeable Cores (LFIC)
    • Each manufactures FSIC (Schlage) or LFIC (others) cores are specific to that manufacture
    • These cores differ dimensionally
    • i.e. You can not install a Schlage FSIC into another manufacturers LFIC prep
  • Small Format Interchangeable Cores (SFIC)
    • These cores are dimensionally similar and will install into other manufacturers SFIC prep

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