Freehawk Portable Outdoor Hunting Knife Survival Tactical Arbor Wheel Knife Camping Folding Knife for Outdoor Adventure, Camping, Household Fashionable Appearance: It is polished by vacuum heat treatment. Durable Material: With aluminium alloy and stainless steel material, the rigidity of our knife can up to 59HRC. Vacuum Heat Treatment: Sharp and durable blade in 440c stainless steel with the skill of vacuum heat treatment. Best Choice: The folding knife is utility with high intensity and high erosion resistance which will be your best choice for outdoor adventure. Multipurpose: Widely used in outdoor adventure activities, such as hunting, camping, hiking and fishing etc.