High Security Cylinders Commercial Locks > Cylinders > High Security Cylinders    6300-SARGENT Model: Series Removable Core The 6300 Series Removable Core cylinders and construction cores allow quick change of keying without having to remove the lock from the door or dissemble the knob or lever. Cores are interchangeable with all Sargent mortise locks, exit devices, cylindrical locks, padlocks and auxiliary locks. 6300 Series Removable Core is ideally suited for: Dormitory Rooms Apartments Tenant Spaces Perimeter Doors on Exit Devices