On Oct 13, 7:42 pm, Christopher Tidy
wrote:

I am looking for a flat screwdriver with an exceptionally thin blade,
for use on clock mechanisms. The blade needs to be at least 3/16" long,
but no more than 25/1000" thick. Does anyone know of a source for such a
screwdriver? UK sources are preferred, if anyone knows of them.

I know I can try grinding my own, but I'm not convinced I can do it neatly.

I'd make my own. In fact, we all did that in high school shop.
Forged some drill rod, filed to shape, hardened, tempered.

You could probably get 3/16 drill rod up to red heat with a larger
propane torch, give it a few good whacks, then do the rest by filing.

Sure you could file it with no forging, but in theory forging will be
stronger. Shouldn't take more than a few minutes to file it.

Then harden. And temper, so it doesn't shatter. And even then you
might want safety glasses when using it.