Zwilling J.A. Henckels Twin Four Star II Hollow-Edge 7-Inch Santoku Manufactured in Germany Special formula high carbon NO STAIN steel SIGMAFORGE knife is forged from a single piece of solid steel Ice-hardened FRIODUR blade starts sharper, stays sharper longer, and has superior resilience Ergonomic polypropylene handle is permanently bonded for seamless accuracy and no gaps Stainless steel end cap with the ZWILLING J.A. Henckels logo 57 Rockwell Hardness = excellent edge retention Edge angle 10 degrees per side