The blade design, the outstanding cutting performance, the balance between sharpness and tool life, reflect the "soul" of this type of knife in an optimal way. The special feature of the SOUL collection is the unique alloy of the blade steel: The patented Nesmuk steel contains the rare element niobium - this ensures the finest possible steel structure despite the inertia of rust. At the same time, a higher mechanical strength is achieved, the blade becomes stronger and tougher. The tested steel hardness is 60 HRC. The result is an increased service life and cutting durability. Although the steel's toughness makes processing more difficult, the combination of the fine steel structure, the unusually thinly ground blades and the craftsman's precision of the manufactory achieves the extreme sharpness that distinguishes Nesmuk from conventional knives.