Tamahagane San Tsubame Wood SNH-1114-7 inch, 175 mm Santoku Knife Manufactured by Kataoka and Company in Niigata, Japan The word Tamahagane means "precious steel" 3-Ply stainless steel with VG-5 center and the outside layers of SUS410SS Dark laminated wood, hand hammered and sandblasted for a matte finish The angle of the edge is 14 to15-Degree and 61-Degree on the rockwell scale for hardness