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