The Extrema Ratio Aero FX in mud is a purpose-built fixed blade designed for concealed neck carry and tactical use. The 2.75" tanto blade is made from MIL-C-13924 nitrogen steel with a black burnished finish -- this specification denotes a black oxide corrosion-resistant coating process commonly used on military-grade steel, and the nitrogen-alloyed steel adds strength and corrosion resistance. The mud (gray and green) anodized aluminum handle features orange accents for quick visual identification, and the full extended tang construction ensures durability in a small package. A thumb pull and lanyard hole add practical utility, and the knife ships with a black Kydex neck sheath fitted with double cut-resistant rubber loops for horizontal belt carry as an alternative wear option.

Overall length 6.88" (17.48cm). Blade length 2.75" (6.99cm). Blade steel MIL-C-13924 nitrogen steel, black burnished finish. Blade shape tanto. Handle mud (gray and green) anodized aluminum with orange accents. Full, extended tang. Thumb pull. Lanyard hole. Includes black Kydex neck sheath with double cut-resistant rubber loops for horizontal belt carry.