Ignoramus699 wrote:
I recently had to drill through some high strength steel (Proto socket
extension)


http://igor.chudov.com/projects/Clau...k-Key-0001.jpg

It was a pain in the ass and a regular drill bit was unable to drill
it.

I had to use a carbide end-cutting endmill.

Have a look at the Twisters if you have difficult drilling applications.
They are specifically designed for tough materials.
http://www.maford.com/new.asp


--

John R. Carroll
www.machiningsolution.com