On Thu, 24 Sep 2009 13:47:55 -0700, JIMMIE wrote:

I have a few left handed drill bits. I use thes exclusively for
extracting broken bolts. I was wondering if this is the only purpose
for which they were intended.

Jimmie

Yes. I used to sharpen some broken bits backward and paint them yellow
just for this purpose. The colour was only a way to recognize them in the
drawer quickly. They worked great when needed. Why would they have to have
multi uses anyway? This one use was a real enough time saver when needed.