High carbon, nitrogen enriched 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 Precision-honed and laser-controlled edge to ensure ideal cutting angles for sharpness and durability ZWILLING logo debossed on the handle TWIN Master are the knives professionals reach for. They meet all the requirements of strict hygiene, safety, and quality regulations demanded in a commercial kitchen. And now they are available for purchase for the home kitchen.Featuring a high initial cutting performance, long lasting cutting properties, and ergonomically shaped handles, TWIN Master provides the ideal selection of knives for a demanding kitchen. The knives in this series are NSF certified and have been independently tested for use in a commercial food service setting. They conform to all relevant NSF / ANSI standards for commercial food use. These are the perfect knives for the ambitious home cook looking to maintain the highest standards in their cooking tools.