4) SR101 = I consider this a medium between the SR101 and INFI. Very capable steel. I only have a Crash Axe and Chopweiler made from this metal so far, but I was impressed and pleased with it.
Correct me if I'm wrong, but I was under the impression that the Crash Rat was made from SR-77, and was in fact the first product to use the steel (well before the Yard existed). Am I confusing my history here? I could have sworn that's what I read.