The blade is made of 32 layers of softer stainless steel on the outside and has a core of VG10 steel. The outer layer is hammered (Tsuchime) and ensures less contact with the product during cutting. I always add: "the potato will not fall off, but it certainly gives less friction''. The handle is made of rosewood with a black bolster. The Kanji (Rooij) on the blade gives the knife its own identity.