Muela-7121-P Canguros Mini, Tactical Kangaroo Knife (Pack of Two) Dual Knife Set 8.5" and 4" Overall Lengths Blade Material: 440 Chrome-Vanadium-Molybdenum Alloy Martensitic Steel, Hardness of 54-58 degrees on the Rockwell Scale Manufacturas Muela knives from Joy Enterprises are handcrafted in Argamailla de Calatrava, Ciudad Real, Spain.