ZWILLING J.A. Henckels 30738-183 Twin Signature Hollow Edge Rocking Santoku Knife, 7", Black/Stainless Steel Manufactured in Germany Special formula high carbon NO STAIN steel One-piece precision-stamped blade for a lighter weight knife without sacrificing strength Ice-hardened FRIODUR blade starts sharper stays sharper longer and has superior resilience Ergonomic polymer handle is perfectly bonded to full tang Traditional three-rivet design is embedded with ZWILLING J.A. Henckels logo 57 Rockwell Hardness = excellent edge retention Edge angle 10 degrees per side