This series of working blades have been developed for an heavy use. The three sizes fit themselves to different environments and situations of use. The KL and KH are suited as a team-work tool, the KL is more suited to the Asiatic, South-american jungle, the KH, more heavy, is more suited to the European and African forest. Produced in cobalt steel N690, they are equipped with an half-rigid sheath with a shoulder-belt and a tactical kit. The ergonomics of the Forprene handle has been developed in collaboration with the Laboratory of Motorial Sciences of Perugia.