Tim Williams wrote:

http://www.metalworking.com/dropbox/holecutter.jpg

Sweet. Makes me want to try at the holecutting business again
Too bad I have to find hardenable stock and file it to hell, since I don't
have a mill or Kasenit!

Kasenit is cheap. You could start with pipe if you can find an
appropriate size. If you don't have a forge for heating, etc., check
out Ron Reil's page. You can make one for bopkas. Once you have the
forge, used (broken) automotive coil springs are good for making many
tools where HSS or carbide isn't needed.

Do you have a lathe? If so, you can pick up an import "spin index" for
under $50 and start collecting 5C collets.

Ted