Intel Flash Image Tool at version 12.0.40.1434, compressed into a 6.12 MB RAR. FIT comes from Intel's CSME System Tools and is used to create and modify SPI images, including the flash descriptor, ME firmware, BIOS region and soft straps. In repair work it rebuilds images with a cleaned Management Engine region after corruption. It fits ME firmware of the 12.0 branch. Always read and store the original chip with a programmer before writing, and confirm the rebuilt image matches the chip size.
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.