Where can I find a tool to do this?

[Porter Bassett]

Think of the handle attaches to the tool on a push broom or a paint roller on a long handle. I've seen two types -- ether the end of the handle is tapered and fits into a tapered hole, or the end of the handle is threaded and screws into a coarsly threaded hole.

I want a tool to make either one of those holes so that I can make tools that I can attach to and take off of handles.

Does anybody know of any such thing?

[Shawn Buonarosa]

I think this is what you're looking for..http://www.bealltool.com/products/threading/threader.php

[Tom Veatch]

Or one of these:
http://www.highlandwoodworking.com/index.asp?PageAction=VIEWPROD&ProdID=3055

[Dewey Torres]

Porter...

What are you making?

[Bob Luciano]

I hope this isn't a violation but there is a guy that makes a jig on youtube that I bet you could make to do what you need
http://http://www.youtube.com/watch?v=CdWPOx_UpzE