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Home Products ANT - N690 Stonewashed

Price$125.00
Quantity add to cart

ANT - N690 Stonewashed

by Extrema Ratio

SKU 1146180

Date Added 06/05/2026

# Available 1

Price $125.00

Overview

Ant is the most compact of the Extrema Ratio folding knives. Despite its small size, this model has an extremely robust, resistant and reliable structure. The handle consists of two different elements, the grip made of anodized anticorodal aluminum and the tempered steel frame that functions as a locking mechanism for the blade (Frame Lock System). Part of the frame is bent inwards to firmly fix the blade when opened, thus increasing the operator’s safety during use.

On the shank there is a slot for inserting a lanyard; on the right side of the handle there is a steel clip that allows to conceal the knife inside the pocket. Ant is available in 4 versions with two different types of steel both supplied by Böhler, an Austrian company which Extrema Ratio has been collaborating with for more than 20 years, using their time-tested materials to produce its blades.

Ant Black and Ant Black Stone Washed are made of Böhler N690, hardened to 58 HRC for better balance between edge retention and strength; this is a type of steel used by Extrema Ratio for the majority of its knives.

Rescue Red Stone Washed M390 and Black Stone Washed M390 are made of Böhler M390 steel heat treated to 61 HRC which, thanks to metallurgical powder production processes, guarantees cutting effectiveness, resistance to wear and oxidation over time. The sheepsfoot blade is equipped with a small slot on the top to facilitate opening. Its particular structure, thanks to the straight edge, allows the user to comfortably rest his fingers on the back of the knife and use it smoothly.

Ant Rescue, unlike the other 3 versions, has a red grip that allows the operator to find the knife more easily in the event of a fall. This version is equipped with a specific serration that allows it to cut ropes and even extremely strong aramid materials. This model also features a tapered shank that acts as an emergency screwdriver. Thanks to these peculiarities, Ant Rescue has been selected by the ‘Alpine Troop School of the Italian Army’ to be part of its equipment.
 

Comes with original box and papers. Excellent condition. 

Product Details

Blade Length 2

Overall Length 5

Closed Length 3

Weight (oz) 1.4

Source Previously owned

Additional Specs

Blade Material N690

Blade Details Wharncliffe, Sheepsfoot

Handle Material Metallic

About the Maker

Extrema Ratio
Extrema Ratio

Extrema Ratio, located in Prato, Italy, has been designing, manufacturing and selling high performance combat, military, kitchen, hunting and tactical knives since 1997. Extrema specializes in the development and production of professional cutlery for military, public security and rescue use.