William - welcome to the foums. 0170-6C is a carbon tool steel that is exclusive to Camillus Cutlery and is used primarily on the BK&T knives, though the Fisk OVB bowie and the Terzuola Black Ops CQB series have this steel. It is comparable to A2 tool steel in performance. 0170-6C is a tough steel, has a lot of bite and good edge holding characteristics. Because it is not a stainless steel, it resharpens easier than SS. Which is good if you are out in the field with a BK&T (hunting, camping, etc). BK&T knives are manufactured in Camillus, NY, along with the rest of the Camillus line. Hope this answers your questions!