Muela 8-Inch Historic Navaja Folding Knife. Jeweled Inlay Handle 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. The look and feel of an 18th Century Folder, hand placed scales Historic Replica Folding Knife based on 18th Century Design Lifetime Warranty direct from Muela's Authorized North American Agent, Joy Enterprises