No Sir! I did not say that it was # 1 in toughness. I said that it was the # 1 most used Die steel. And it is used more than any other in the business. That is not to say what is the toughest. I would think there many contenders for that title. To say that it isn't tough, would be a gross understatement. It is hell bent for tough. I have a hunter here that was a prototype for the knives I made for Ted Nugent. The blade is only 3/32 thick, and heat treated to 61 Rc. It is deeply hollow ground, with a tiny spine. In testing, the blade wan bent to failure. It is cracked from the edge, to 3/4 up the blade to the spine. Most steels would have snapped on the spot. I have been using it in this condition for over 15 years, on many, many hunts. The edge is only .010 thick! All this without a differential temper. That's tough. And really makes me wonder just why we need a differential temper on a 1/4, and many times 3/8" thick spinned knife. If this isn't strong enough with good straight forward heat treat. It isn't a knife we need at all. It's time for a recking bar. You have already passed what a typical pry bar can stand. I think all this is for bragging rights to our buddies, more that any practical value. Add to this thatt many differential tempered knives would fail from bending so easily, that any benefit is totally lost. If it takes 30- to 50-lbs to bend a knife, who'sedge is probably going to crack any way,when differentialy tempered, compared to 100 lbs to 200 lbs, before sustaining any dammage, due to full tempering, where was the advantage. Most knives that can bend, due to an ultra soft back not only dont have very much practicle strength, The edges are often so soft, to keep them from breaking, that they are far below what is the accepted norm for edge holding. I want a knife first, and can't accept this compromise. if i want this type of edge holding, I would go to wally world, and buy something made of 440-a, Or AUS-6-8. But I will not produce such a knife. It's just not why I make knives.