A specialized steel developed by Dan Maragni with extreme toughness and endurance. We have literally chopped through a cement block and the blade suffered no major edge damage. DM1 has 0.95% Carbon, 0.46% Managanese, 0.45% Chromium, and 0.19% Vanadium with a typical hardness of 58-59 Rc. Learn more about DM1 here. All DM1 steel coming from A.G. Russell will be made in our Shop here in Northwest Arkansas. So far we have used the steel mainly on our Sandbox series, a series of knives intended to equip our troops serving in the Middle East.