Extrema Ratio Kukri Black Fixed Blade Knife 13.5in Cobalt Steel Blade Black Forprene Handle EX. Made famous by the Gurkha regiments serving under the British crown the "kukri" is a Nepalese all-purpose blade descended from ancient Greek sickle-shaped swords. It's ultimately a machete with a top-heavy forward-positioned cutting edge which enables it to function as an axe while retaining the versatility of a long blade. The razor-like hollow grind closer to the grip yields a fine sharp edge without compromising the overall thickness of the back of the blade (which needs great sturdiness). The tip portion of the blade is instead flat ground well-angled to effortlessly penetrate wood and vegetation. While similar tools are usually made from softer steel alloys for elasticity and ease of honing we were able to achieve adequate elasticity using hard BOHLER N690 steel making for a remarkably durable edge. Specifications for Extrema Ratio Kukri Fixed Blade Knife: Blade Thickness (in): 0.25 Blade Material: BoHLER N690 STEEL (58HRC) Blade Finishing: MIL-C-13924 BURNISHING Main Grid: RAZOR/FLAT Handle Material: FORPRENE Package Contents: Extrema Ratio Kukri Fixed Blade Knife Specifications for Extrema Ratio Kukri Fixed Blade Knife: Manufacturer: Extrema Ratio Blade Material: N690 Handle Material: Forprene Handle Color: Black Handle Finish: Forprene Sheath Material: Nylon Extrema Ratio EX170KH: Kukri Black Fixed Blade Knife 13.5in Cobalt Steel Blade Black Forprene Handle