These NEW blades are harder than any previous blades on our standard Aurora Fire Starters.We designed these new laser cut 440C Fully Hardened Stainless steel blades with corrosion resistance in mind and superior resistance to wear as compared to older model blades. These blades will yield thousands of strikes and can be flipped over to reveal a fresh striking surface after prolonged use or can also be sharpened. These blades are great in tough environments and will not oxidize over time. All Aurora Fire Starters shipped ON OR AFTER 07/31/09 are equipped with these now standard NEW 440C blades. Includes one extra stainless steel mounting screw and mounting instructions. Made in USA!