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This is another backup knife from Extrema Ratio. Extrema Ratio has taken the popular Scout and modified it to make a version that is classified as a combat version. The Defender has a very slim shape with a fuller (aka “blood drain/groove”) that makes the Defender lighter without sacrificing strength. It is an excellent, fixed blade suitable for your self-defense as well as your EDC.


The Defender's blade has a clean edge and a narrow profile that ends in a spear point. Its tang extends beyond the handle end to form a lanyard hole. The single guard also has a lanyard hole. The jimping on the Defender's spine gives you a pressure point for your thumb or forefinger for better control. Plus the jimping, along with the guard, prevents your fingers from sliding onto the blade. Very sharp blade.


Lightly textured to give you a good grip. Streamlined and removable. The Defender's handle has a distinctive shape that is typical of many Extrema Ratio knives.


The Defender sheath is made of Kydex. It is MOLLE compatible. Has four reinforced lanyard holes – two in each side. Automatic retention system. Does not have belt loop.

Total Length of Knife: mm 215.90 (8.50 inches)

Blade Length: mm 101.60 (4.00 inches)

Handle Length: mm 114.30 (4.50 inches)

Total Length of Knife and Sheath: mm 244.60 (9.63 inches)

Weight of Knife: g 127.57 (4.50 ounces)

Weight of Knife and Sheath: g 195.61 (6.90 ounces)

Blade Thickness: mm 4.83 (.19 inches)

Blade Width (Widest Section): mm 27.94 (1.10 inches)

Blade Steel: Bohler N690 cobalt stainless steel*

Blade Hardness: Rockwell 58 HRC

Grinding: Flat grind

Serrations on Blade: No

Handle: Black Forprene**

Sheath: Kydex. MOLLE compatible.


* The blade is made with N690 cobalt stainless steel; a high performance steel with excellent cutting and sharpening characteristics. This steel is also used in the butchering industry and to make surgical instruments.

** The Forprene handle is resistant to extreme temperatures and moisture. It can be disassembled for easier cleaning.

Availability: Usually ships in 2-3 business days

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