On Sunday, March 19, 2017 at 8:05:49 PM UTC-4, wrote:

Greetings Bob,
Form taps make a stronger thread in materials that are fairly ductile......
I use form taps
as much as possible in my shop.
Eric

I have no experience with form taps, but I have the impression that they last longer than cutting taps in some metals. Is that right or am I wrong?

Dan