Puukko, Walnut and BoneA puukko is a small traditional Finnish general purpose belt knife with a single curved cutting edge. General purpose knives of this type have been used in Scandinavia since the Viking Age, and are still widely in use. The knife has a handforged, sharpened carbon steel blade with Grimfrost in runes. The handle is made from walnut wood, bone and brass. Material: Handforged carbon steel Handle from walnut wood, bone and brass Overall length: approx. 7.