This 5-inch serrated utility knife is ideal for cutting through crusty bread, and thick-skinned fruit, and vegetables. The serrated edge makes cutting through soft-on-the-inside, hard-on-the-outside food effortless, including tomatoes, salami, and bread. Four Star knives are made of proprietary special formula steel that has been perfected for almost 300 years. Combined with ZWILLING's signature ice-hardening technique, these FRIODUR blades are harder, sharper, they will not stain or chip, and they retain their sharpness longer. Precision forged from a single piece of steel, the SIGMAFORGE knives have an exceptionally sturdy, balanced, and flexible blade. Ergonomic polypropylene handles permanently bonded for seamless accuracy and gaps SIGMAFORGE knife is forged from a single piece of Special Formula High-Carbon NO STAIN stainless steel Ice-hardened FRIODUR blade starts sharper, stays sharper longer, and has superior resilience Precision-honed blade and laser-controlled edge ensures ideal cutting angle for sharpness and durability 57 Rockwell Hardness excellent edge retention Edge angle 15 degrees per side Dishwasher safe, hand wash recommended Manufactured in Germany Utility Knives Sports & Rec.