I made a chisel from a hand file over twenty years ago. The one with the blue handle. It has a permanent place in my tool pouch. It functions as a wood chisel. As a fine and medium file. It also works very well as a wood scraper but it’s only an inch and quarter wide. It can even take the place of small planes. It is strong enough to be used as a prybar. To make it I used a bench top grinder with both water and cutting oil in tubs to help mould the metal. I first would emerse the tool in cutting oil then as the metal started to turn blue dip it in water to cool it. After grinding a hollow ground end down to a point, 5" radius grinder. I put a finished edge of 25 degrees on it. I honed the edge by using a piece of flat plate steel and a piece of 2000 grit emery cloth with water. After honing it to razor sharp I finished it off with leather to a mirror shine. Then I dipped the handle in the tool handle rubber solution. It was in use during my engineering career almost daily as it had such a great combination of tools. The other one with the red handle is one that I recently created and is not quite finished, is a wood rasp. I am sure others have made some fantastic tools out there, post em if you got em.
-- CHRIS, Charlottetown PEI Canada. Anytime you can repurpose, reuse, or recycle, everyone wins!