Military personnel and survivalists alike will be more than pleased with one of Extrema Ratio’s newest blades.

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Extrema Ratio’s all new SERE 1 was developed together with special forces operators, martial artists and survival techniques experts. The knife is similar to a push dagger, but it has been redesigned as a multipurpose knife, suitable both for cutting and tip use.

The SERE 1 comes with a partially serrated blade for cutting ropes, a belt cutter and a screw-pin shackle wrench.

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Extrema Ratio has classified the SERE 1 as a multipurpose knife because it says the knife is the perfect “compromise between combat knives and camp knives.” The SERE 1 is also versatile and most suitable for integrating in standard military equipment.

The SERE 1 is available now and retails for $322 on

For more information on the SERE 1 and other products from Extrema Ratio, please visit


  • Weight: 10.79 ounces
  • Blade Length: 4.37 inches
  • Total Length: 8.43 inches
  • Main Blade Thickness: 0.25 inches
  • Blade Material: Böhler Steel N690 (58HRC)
  • Handle Material: Forprene
  • Serration on the Blade: Yes
  • Main Grinding: Flat
  • Blade Finishing: Burnishing Mil-C-13924

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