There was nothing else near where we found near it.Looks definitely hand made to me; ie: in a forge. I would venture a guess and say it might be a screwdriver? Was there anything with it when you found it? Like other small pieces of iron? Or perhaps some wood that might have been a handle at some point?
Thanks for the link! I'm not sure it's the same, but definitely worth taking a look at.IF the side edges show a one sided blade effect , it could be a wood bit.
A long enough handle and wooden pipes could be made.
There's a flat bladed Gimlet on Etsy this forum won't let me upload..
If you click on the link you'll see it and maybe agree. Or disagree..