SC Kiritsuke Petty 145mm (5.7 in) Blue#2 Stainless CladType: Kiritsuke Petty Finish: Nashiji Finish Blade Length: 145 mm (5. 7 in) Construction: Aogami#2 (Blue Carbon Steel) with Stainless Steel Cladding Core Edge Steel: Aogami (Blue) #2 HRC (Rockwell Hardness): 60 Handle: Pakkawood Bevel: Double Bevel Place of Origin: Tosa Blue (Aogami) #2 (Hitachi Metals Ltd.) is made by adding Chromium and Tungsten Wolfram to White Steel #1. This results in increased toughness and the production of hard carbide