Franchi, I think you are right. If you are not sure what type of steel and to what temperature to harden and anneal, then leave it alone, especiallly screw drivers that cost $.99.
I did buy some at one time and did grind them, the hardest part is making the tip parallel with the slot and not to hollow ground it, but to make the tip fit perfecftly. Hand holding doesn't do it. If you had a surface grinder, then yes.
The Wheeler set is great for American guns. I don't have any for my Greener and I sure would not grind something unfamiliar and try it on those small slots. Even with the right ones for the Greener I would be speptical on them working. They have been there for over a hundred years.
