Extrema Ratio Rao Steel Knife Dark Stone N690 (04.1000.0221/BLK-SW)
- Rao Steel Dark Stone- compact full tang tactical knife made from a single piece of N690 steel and dark stonewashed finish. Fully integral design with a modified tanto profile, ideal for tactical, outdoor and survival tasks.
Rao Steel Dark Stone is the technical essence of durability - a knife designed as a monolithic tool for special tasks, reduced to the purest form of functionality. Based on the line of the iconic Rao model , the Italian brand from Prato has created a variant with full structural integrity: a single lump of hardened steel, without grips, with a clearly contoured geometry and a raw, tactical finish. Blade of modified tanto type was derived from high-quality stainless steel Böhler N690, hardened to approximately 58 HRC, which provides impressive abrasion resistance and edge stability even under extreme stress. The Blade's tip has been thickened for increased piercing power, while the flat grind allows for efficient transfer of cutting energy. The entire blade is finished in a dark stonewashed style , which gives the blade a matte texture with low reflectivity and increased scratch resistance - a key feature in tactical environments. The Handle is one piece with the blade - it's a true integral full tang construction , free of grips and designed for structural strength. Side milling provides control and stability in the grip, while a neon green paracord mounting hole allows for quick access and personalization of the tool. The knife remains stable in the hand even when wearing gloves, in precipitation or working under stress. It comes with a matching Kydex holster, allowing for quiet and multi-position carry - vertically, horizontally or in an inverted grip configuration. The Rao Steel Dark model is the choice for users who demand raw functionality, reliability and absolute resistance to field conditions.
N690 - corrosion-resistant, high-carbon 1.07% (C), martensitic chromium steel 17.30% (Cr) with molybdenum 1.10% (Mo), vanadium 0.10% (V) and cobalt 1.50% (Co) for structural uniformity. Features exceptionally high corrosion resistance and long edge retention. One of the best tool steels in the world today. It achieves a hardness of 57-60 HRC. Manufactured by Böhler Edelstahl in Kapfenberg, Austria.
Blade - made of hardened Böhler N690 stainless steel is characterized by excellent corrosion resistance, high sharpness retention and resistance to dynamic loads. The modified tanto profile combines cutting aggressiveness with structural strength - the thickened tip increases penetration ability, and the flat grind facilitates deep, precise cuts. The dark stonewashed finish emphasizes the industrial character of the model, masks traces of use and ensures operational discretion. Additional milling on the back (jimping) improves control during precision work.
Handle - the integrated handle has been milled from the same piece of steel as the blade, creating a monolithic full tang construction, guaranteeing unparalleled torsion and impact resistance. The open geometry with minimalist side milling allows for a stable grip no matter the conditions - from mud to precipitation. The paracord in neon green, threaded through the lanyard hole, plays a protective role and facilitates quick retrieval. It comes with a molded Kydex holster with a mounting system that allows for flexible adjustment to personal equipment. This is a Handle designed for combat, work and survival - without compromise.
Technical data:
Product number: 04.1000.0221/BLK-SW
Product name: Rao Steel Dark Stone
Overall length: 190.0 mm / 7.48"
Blade length: 87.0 mm / 3.42"
Blade thickness: 5.0 mm / 0.19"
Handle length: n.d.
Handle thickness: n.d.
Weight: 130.0 g / 4.58 oz
Blade material: Böhler N690
Blade hardness: 58 HRC
Blade grind: Flat
Blade finish: Dark Stone
Handle material: Böhler N690
Handle finish color: Dark Stone
Sheath: Kydex
Additional accessories: Paracord rope
Designer: Extrema Ratio
Brand: Extrema Ratio
Manufacturer: Extrema Ratio, Italy
Country of Origin: Italy
Developed by: the Sharg® company
Przeczytaj!
This product is intended for use only by adults with knowledge and experience in handling sharp cutting tools. Improper use of the knife can result in serious injuries. The blade is extremely sharp and can easily cut through skin and tissue; therefore, extra caution should always be exercised while cutting, and hands should be kept away from the cutting edge. To prevent the knife from slipping, it is recommended to cut on a stable, non-slip surface and avoid excessive force, which may cause uncontrolled blade movement.
Leaving the knife on the edge of a table, countertop, or in easily accessible places—especially where children are present—poses a significant safety risk. The knife should always be properly secured after use, ideally by placing it on a stable surface or storing it in designated knife blocks, protective sheaths, or magnetic strips. The knife should never be used for tasks it is not designed for, such as opening cans or prying objects, as this can damage the tool and lead to dangerous accidents.
A dull blade increases the risk of injury, as it requires more force and is more likely to slip from the material being cut. Therefore, it is essential to sharpen the knife regularly to maintain optimal sharpness. Additionally, proper cleaning and drying of the knife are necessary to prevent corrosion and bacterial growth. Periodic inspection of the handle and blade is recommended to check for cracks, chips, or looseness. If any damage is detected, the knife should be repaired or replaced immediately.
When using the knife, focus solely on the task at hand—avoid talking on the phone, watching television, or other distractions while cutting. Ensure proper lighting in the workspace for better visibility and control. Please note that some countries or regions have laws restricting the ownership and carrying of knives. Before purchasing or using this knife, verify that its use is legal in your location according to applicable regulations.
Following these safety guidelines will help ensure safe and effective knife use, minimizing the risk of accidents and extending the lifespan of the tool.