Dennis McDonough recently started a thread about hand drills, but I didn't want to hijack it. Bob Smalser made mention of the various auger bits. I had no idea that Irwin were made for soft wood and the Jennings for hard wood. Other than the name stamped on the bit, is there a ready way to tell them apart, since I have to get out the magnifying glass to read the names. It may be obvious, but after looking at several of mine--Irwin, Jennings, Swan, "no name"--I can't seem to identify a difference other than the obvious--single v. double twist etc.

Thanks. Mark