Packed as RAR (6.32 MB), this is Intel Flash Image Tool version 12.0.70.1652. FIT belongs to Intel's ME System Tools and is what technicians use to rebuild an SPI flash image: open the existing dump, review the region layout and ME settings, insert a clean ME firmware and build a new binary. The finished file is then written with an external programmer. The 12.x tool only handles images whose ME firmware is from the same generation, so check the ME version first, and never write the chip without keeping a copy of the original read.
The button opens the matching file on RM Schematics, or a source page if it is not catalogued there yet. The original attachment is from @mfittool. Enginerys does not host this file.
How to open a .rar file
Compressed archive — the usual wrapper for a schematic + boardview pair or a BIOS + EC set.