Muela Folding Lockback Knife 4.625-Inch Closed, Grey Micarta, 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. Grey Micarta Scales with Brass Bolsters Traditional Spanish Navajas, Folding Knife Lifetime Warranty direct from Muela's Authorized North American Agent, Joy Enterprises