The quality and tradition of these Zwilling J.A. Henckels Professional S Series knives are trusted worldwide by professional chefs. The series features a solid full steel, and the seamless manufacturing gives these knives optimum balance and safe handling. Each knife has a full tang triple riveted handle, making these knives very durable. The J.A. Henckels Professional S Series knives have the same excellent steel as the Four Star Series Knives. All J.A. Henckels products are manufactured in Solingen, Germany, and come with a lifetime guarantee/warranty.