file marked to cut
side ground down
gun blued
sized to fit in an altoids tin

I saw this project on youtube and wanted to give it a go. I called around to local antique dealers and found one cleaning out his back shed and was throwing out a lot of old steel for scrap. He offered me some old files for free so I grabbed as many as I could for a mate that’s into making knives out of them. We used his workshop to cut the file and found it it wouldn’t spark until the sides were smoothed. We polished it up a little and applied gun blue to stop it rusting, leaving enough of the file edges in for looks. It was cut to fit an Altoids tin in length. I didn’t bother drilling a hole in the end for a lanyard.