Italian manufacturer Extrema Ratio delivers some of the toughest knives on the planet.

One such knife, the Dobermann, has been in existence for a long time, but the latest generation of the Dobermann brings an old shape to a new knife realm.

The Dobermann IV represents the evolution of the first and most classic Extrema Ratio model: the so called K1 Dobermann.

The main features of the Dobermann IV are its heavy structure and its extremely flexible use. From hunting to survival environment, as well as camping, military or defensive use, the Dobermann IV has no bounds.

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For this reason, Dobermann IV has been developed in two different versions: a tactical and a sporting one.

The Tactical version comes with a black blade and cordura sheath, while the Classic version comes with a satin blade and black leather sheath.

Since 1997, the Dobermann knife has undergone significant changes in its look and design, based on the natural evolution of consumer taste and market trends, while still keeping its shape consistent with the original designs.

For more information on the Dobermann IV and other products from Extrema Ratio, please visit


  • Weight: 12.54 ounces
  • Blade Length: 6.69 inches
  • Total Length: 12.4 inches
  • Main Blade Thickness: 0.25 inches
  • Blade Material: Böhler Steel N690 (58HRC)
  • Handle Material: Forpene
  • Serration on the Blade: No
  • Main Grinding: Flat
  • Blade Finishing: BURNISHING MIL-C-13924

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