Muela Folding Lockback Knife 4.625-Inch Closed, Kingwood, Brass 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. Exotic Kingwood with Brass Bolster Traditional Spanish Navajas, Folding Knife Lifetime Warranty direct from Muela's Authorized North American Agent, Joy Enterprises