For the Zwilling Professional "S" Chef's Knife, 8", the Sigmaforge process is the precision-forging method used to create an exceptionally hard yet flexible blade.
Zwilling's Friodur ice-hardening technique gives the blade added hardness and sharpness while also making it exceptionally durable, corrosion resistant and highly elastic.
The knife's balance comes from its full tang construction, with one solid piece of steel extending from the tip through the end of the handle.