Extrema Ratio Draws First Blood of 2016 with Chilean-Inspired Knife

Extrema Ratio is not afraid to be bold. The Italian manufacturer makes knives that are simultaneously rugged and refined, with an angular design language and modern, tactical look that is instantly recognizable. Last year, the brand released a number of striking designs, including tactical kitchen knives and a tactical straight razor that was met with much furor. This year, they have slowed down to focus on their martial roots: so far they’ve released a new neck knife and a dedicated combat knife, the Extrema Ratio Corvo. The new blade, which starts shipping this week takes its inspiration from an obscure but deadly historical weapon.


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The corvo is a traditional Chilean Army combat knife, with a hooked, beak-like point. Named to sound like the creature it resembles (“Cuervo” is the word for “raven” in Spanish), the blade has been used by Chilean forces since the time of the Conquistadores.

Extrema Ratio Corvo

Extrema Ratio takes this traditional combat knife and updates it with modern technology and their own signature touches. The blade shape resembles the original corvo, but is more like a wicked combination of a hawkbill and tanto. Recurved like a hawkbill, the 7” blade should have aggressive pulling and slashing power. From the tanto it borrows a secondary, sharpened chisel-like edge at the tip. Made from Böhler N690Co steel, a common choice for Extrema Ratio knives, it’s finished in an anti-reflective black coating and their signature angular, yet ergonomic handle.

Extrema Ratio N.K.3 Camo Neck Knife

Also new is the Extrema Ratio N.K.3, a neck knife designed to be small and light enough to carry comfortably but with enough cutting edge to be all the blade you need. A solid, ¼” think slab of N690 steel forms the entire knife, and is thick enough to not need handle scales. Instead, the knife is milled with several indexing divots to give to give a secure hold in a variety of grips. The blade comes in black, stonewashed, or desert warfare camo finishes and ships with a kydex sheath.


Knife featured in image: Extrema Ratio TK S.E.R.E. 1 Trainer

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