Extrema Ratio Fulcrum Fxd Knife 7in Srtd Steel Tanto Black Hdl Black Sheath EX082. Specifications for Extrema Ratio Fulcrum 7in Fixed Blade Knife: Manufacturer: Extrema Ratio Blade Length: 7 in Overall Length: 12.13 in Blade Material: N690 Serrated: Partial Included Accessories: Black Sheath Handle Material: Forprene Handle Color: Black Package Contents: Extrema Ratio Fulcrum 7in Fixed Blade Knife Extrema Ratio EX082: Fulcrum Fixed Blade Knife 7in Serrated Cobalt Steel Tanto Black Forprene HandleBlack Sheath