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Extrema Ratio BF1 Classic Drop Folding Knife

$289.00 $329.00 Include GST

or 6 weekly interest-free payments from $48.16 with Laybuy

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Model: 135BF1CD

Made in Italy

The Extrema Ratio BF1 Classic is a cool, sleek pocket knife. Compared to the large pocket knives that Extrema Ratio normally produces, this knife can indeed bear the title Basic Folder (BF). Of course, that doesn’t mean this knife has been made any less meticulously.

The blade is made from Böhler N690 steel. This is a very corrosion-resistant steel that retains its sharpness well. The liner lock holds the blade in place. The anticorodal handles are lightweight, and thanks to the contours, this knife feels great in hand. The handy deep-carry pocket clip completes the knife.


Dimensions & weight

Blade height 2.4 cm

Blade length 7 cm

Cutting edge length 7 cm

Blade thickness 2.9 mm

Closed length 10.2 cm

Total length 17.3 cm

Weight 90 g



Material handle anticorodal

Type of steel Böhler N690

Hardness 58 HRC



* 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 handle is made of black anodized Anticorodal, an aluminum alloy that is very strong and corrosion resistant.