what do they use to cut "teeth" in files ?

[soapbarstrat]

And is it something I can get ? Maybe a special cutting bit I can put in the Dremel. I'd like to be able to cut fine "teeth" into home-made files, like for example, I'd like to be able to round the edge of a piece of hacksaw blade, then cut fine "teeth" in it. I've done it with one of those brown Dremel cut-off discs, but it doesn't make the "teeth" as fine as you see on a nut-file, etc.

Or something that can be used by hand, to make the "teeth" ?

Obviously there's some kind of tool they use to do it.

Rob

[Guitarfrenzy]

I found this link that tells about how files was made past and present.

http://www.netris.org/RIToolmakers/FILEMAK...making-H-M.html

[soapbarstrat]

No wonder I always end up paying an arm and a leg for the already made ones