Intel Flash Image Tool (FITool) release 15.0.2.1337, packed as a 7z archive of 19.1 MB. FITool belongs to the Intel CSME System Tools kit and is used to open, inspect and rebuild SPI flash images: it reads the descriptor, ME region and soft straps, and can assemble a clean image from a BIOS region and a fresh ME region. Version 15 corresponds to ME 15 firmware platforms. Match the tool major version to the ME version in the dump you are repairing, and always keep a backup of the original chip contents before programming a modified image.
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 .7z file
High-ratio compressed archive, often used for large BIOS collections.