Zwilling J.A. Henckels Pro Knives combine a lifetime of dependable durability with leading-edge innovation. Zwilling's incredibly-durable proprietary Friodur high carbon steel formula is the result of over 280 years of experimentation. Dependably sharp, corrosion-resistant, balanced for long hours of food prep work in your home kitchen. High tech storage Block automatically maintains each blade during normal use, requiring no sharpening or honing.