Muela Replica 18th Century Navajas Folding Knife 4.5-Inch, Stag 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. Spanish Folder Replica based on 18th Century design. Old fashioned lockback system. Presented in a Gift Box Lifetime Warranty direct from Muela's Authorized North American Agent, Joy Enterprises