"Bob Engelhardt" wrote in
message news
I was rummaging through my tap collection and came across a
couple of forming taps. I have no idea how they got there,
but there they were. Now, the question is: where are they
better used than cutting taps? Since they are more
particular about the hole size, I won't use them unless
they have some advantage.

Thanks,
Bob

Stronger threads in aluminum...