Schlage Full Size Interchangeable core (FSIC) users can enjoy the convenience of fast rekeying without having to disassemble the lock. This feature is very useful in applications where a high frequency of core changes are needed or a lock disassembly is labor intensive such as with exit devices and certain types of all-glass doors, etc.
The lockset that this core will operate in requires a Schlage large format core prep *
Primus XP is Schlage’s high security sidebar cylinder mechanism that brings an added level of security and control to any format of Schlage cylinder.
Aside from thwarting unauthorized key duplication, the Primus features also makes the cylinder pick-resistant. There are nine different levels of security available with Primus, making it a perfect fit for any application needing additional security.