Cydrome Leader wrote:
newshound wrote:

I wouldn't grind on a wheel at all, I would start with the nearest oversize
jewellers' screwdriver and grind by hand on a normal "chisel sharpening"
stone. (On the edge, if it is a good one, to avoid making a hollow). Or
these days on one of those diamond plates.


Or even a file.

I guess you can file drill rod. I'm not sure you could file a good
screwdriver, though. And poor screwdrivers, in my opinion, are not worth
having.

Chris