Masakage yuki petty 150mm. Masakage Yuki knives are Shirogami #2 (White #2) carbon steel clad with stainless steel. The knives are hardened to HRC 62:63. They come with an Oval handle of Magnolia wood and red pakka wood. Cladding a knife with stainless steel on the outside gives you the benefit of easy care while the exposed core carbon steel cutting edge gives you great performance.