What differentiates Colonial Knife Switchblade Knives and cutting tools and automatic knife from the competition? Lets start by stating the following: The primary purpose of a knife is to cut, crappy steel or very high end exotic, makes no difference if not properly hardened. At Colonial Knife, we are methodical about blade hardness, we have learned in our 90 years the importance of Rockwell hardness, the measuring of the blade strength through hardening of the steel. Our standards require Colonial Knife to achieve 58-60 C hardness. Over 60 C and the cutting edge will be prone to chipping, under 58 C, and the blade won't hold the cutting edge and arduous to re-sharpen. Colonial continually monitors the blade Rockwell Hardness to ensure the customer is receiving the very best in their knife.