The DOBERMANN IV represents the evolution of the first and most classic Extrema Ratio K1 DOBERMANN model. Since 1997, the DOBERMANN has undergone considerable aesthetic and design changes based on the evolution of taste and trends, while maintaining a consistent line with the original designs. Perhaps the most versatile of the Extrema Ratio knives, it can be used for hunting, survival, camping, and military use. The DOBERMANN IV prioritizes flexibility of use and structural strength as its main features.