This series of knives have been developed primarily for use on bushcraft and survival. Therefore, the knife is substantially more massive structures.
Moreover, it is provided with a hammer on the end of the handle, which can crush the stones and hammering nails.
Due to the partial hardening is achieved that knife when really big stress rather bend than break.
This is a big advantage, because in crisis situations, it is better to have a fully functional and a little bent knife than half broken.