Sakai Takayuki Aonikou Blue-2 Carbon Steel Utility/Petty Knife, 180mm (7")

Sakai Takayuki Aonikou Blue-2 Carbon Steel Utility/Petty Knife, 180mm (7") It is made from the high-end Hitachi Yasugi-works Blue-2 steel which is a very pure high carbon steel with added chromium and tungsten for increased toughness and durability (making it somewhat less fragile than the "white" steels for example). This steel is also called Aogami or Ao-Ko II in Japanese. Hardness is at least HRC 60.