Extrema Ratio – EX0213BLK – NK3 K – Fixed Blade Knife – Bohler N690 Coated Tanto – Bohler N690 – Black

The Extrema Ratio EX0213BLK, the NK3 K model in black, embodies sophisticated engineering and tactical precision. Designed as a karambit-style neck knife, it offers a blend of compact efficiency and robust performance without compromising on build quality or usability. Crafted from a single piece of Böhler N690 stainless steel with a MIL-C-13924 burnished finish, the NK3 K ensures exceptional edge retention and corrosion resistance. Its symmetrical tanto blade, measuring 2.75 inches (70 mm), features a flat grind and blood-graining slot for enhanced cutting versatility and fluid control. Topping it off, the handle includes an enlarged finger ring, sized to accommodate the pinky for secure retention and swift deployment. The knife arrives in a tailored black Kydex neck sheath that offers discreet, comfortable carry, with optional accessories allowing attachment to the belt or Extrema Ratio Cordura MOLLE systems.

Specifications:

Blade Material: Böhler N690 stainless steel, heat-treated to approximately 58–60 HRC

Blade Length: 2.75 in

Cutting Edge: 2.625 in

Overall Length: 6.75 in

Blade Thickness: 0.24 in

Blade Style & Grind: Tanto-style, flat grind

Blade Finish: Matte black (MIL-C-13924 burnishing)

Handle Material: Monolithic Böhler N690 stainless steel, same as blade

Handle Feature: Enlarged finger ring (pink-friendly) for fast retrieval

Sheath: Black Kydex neck sheath (includes paracord lanyard), optional belt-clip or under-shirt system available separately

Weight: ~3.35 oz (95 g)

Country of Origin: Made in Italy

What’s more, you can experience this item for yourself by holding, smelling it or even taking a selfie with it in person at our local store, Sharp Things OKC, located at 6610 N. May Ave., Oklahoma City, OK 73116. Alternatively, you can purchase with confidence here online at www.SharpThings.com. You will experience world-class customer service in either environment. Don’t miss out on this exceptional product – add it to your cart and your collection today. Feel free to give us a call 7 days a week anytime between 9 AM and 9 PM. 405-286-2112 with any questions.