Ginsu kotta series 5 piece prep set with black block. . . Ginsu kotta series blades are made from commerical quality japanese stainless steel, known for it's strength and durability. Serrated edges ensure a lifetime of use without needing sharpening. Each handle is beautifully shaped and ergonomically designed to fit smoothly into your hand. Japanese steel tang extends into the handle. Set includes: 6 chef knife, 5 santoku knife, 5 utility knife, 3. 5 paring knife, black storage block. .