I went in and looked at their advertisement. I see they temper to 60 Rockwell hardness. That's very good. Some of the best are only 58 Rockwell. D2 or A2 are tool steel and not stainless. Keep a little scent free oil on the edge or it will get lost quickly in even high humidity. Some of the Knives of Alaska are D2 steel. I have one and it has carbon particles that make it cut like a saw blade. A little different than really high grade steels like ZDP-189 which is 67 Rockwell and the highest grade steel on the market right now. I would hate to buy broadheads made out of it because my brothers pocket knife run $750 when it came out. My little knife was only $189. I loose to many heads to pay for the extreme. I find the back half of the arrow after shooting a deer, but I don't know where the heck the head goes sometimes.Iron Will broadheads are $99 for 3 and I think they are well worth it. Sure they're spendy but it's the business end of the arrow and I don't see any reason to skimp on them plus they have a lifetime warranty.