The Ultramarine knife, made by Extrema Ratio, is a top-of-the-line diving knife designed specifically for elite military use. Its blade is made of thick Bohler N690 stainless steel, which is coated with a non-reflective and corrosion-resistant Mil-C-13924 finish. The dagger blade has partial serrations and also includes an integrated strap cutter. The handle is wrapped in nylon, providing a secure and slip-resistant grip. Additionally, the knife comes with a scuba ankle sheath for easy access.

Extrema Ratio

The Ultramarine by Extrema Ratio is a high end dive knife crafted for elite military service. The thick Bohler N690 stainless steel blade is coated with a Mil-C-13924 finish for a non-reflective, corrosion resistant finish. The dagger blade features partial serrations and an integrated strap cutter. Nylon wrapped handle provides a slip resistant grip. Included is scuba ankle sheath for ease of access.

Extrema Ratio Ultramarine Fixed Blade Knife (5.875&quot; Black)

Knives

Tactical Knives

Tactical Fixed Blades

Extrema Ratio Ultramarine Black N690 Fixed Blade Knife

Discover the Ultramarine by Extrema Ratio, the ultimate dive knife for elite military service. With a non-reflective, corrosion resistant blade and slip-resistant handle, this high-end knife is a must-have for any serious diver.

Blade HQ

Extrema Ratio is a prestigious Italian brand renowned for its high-quality, precision-engineered knives and tactical tools. Established with a commitment to excellence, Extrema Ratio combines traditional craftsmanship with cutting-edge technology to produce durable, reliable, and innovative products designed for military, law enforcement, and outdoor enthusiasts. Each piece is meticulously crafted to meet the rigorous demands of professionals who require robust performance in the most challenging environments. Extrema Ratio stands as a symbol of superior strength, functionality, and timeless design, making it a trusted name among elite users worldwide.

Extrema Ratio Knives Division specializes in the design and manufacturing of high-performance knives tailored for professionals in the military, law enforcement, and rescue sectors. Established in 1997, the company focuses on creating effective tools that address specific user needs, continuously evolving their product line based on valuable feedback from customers and partnerships with armed forces globally. By prioritizing the enhancement of established designs over unnecessary innovations, Extrema Ratio is dedicated to producing reliable and durable knives that meet the rigorous demands of professional users. They also offer custom items tailored to individual specifications, ensuring that their products are both practical and tailored for various operational requirements.

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Extrema Ratio Ultramarine Black N690 Fixed Blade Knife

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