There are probably industrial grade hole saws that are more capable of doing heavy duty stuff, like stainless, but I don't know where to get them. Probably I couldn't afford them if I did. For the $ 15 the ones I found at H.D aren't bad, though. I punched 14 holes in my axle, lots of holes in up to 3/8 plate, and mine are still sharp. Usually the teeth start getting dull or break off after so many holes.

Well, can't put off bed any longer. See ya.


Don