Name: Extrema Ratio Kiri 04-10000187BLKSW Dark Stonewash, fixed knife
Brand: Extrema Ratio
SKU: ER04-10000187BLKSW
Price: 224.45 GBP
Availability: InStock

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The **Extreme Ratio Kiri** was inspired by the Japanese Kiridashi, which is originally a marking knife, used by craftsmen like carpenters and furniture makers. One of its peculiarities is its asymmetric bevel; only one of the two sides is sharpened, while the other remains flat. Extrema Ratio has reinterpreted this traditional Japanese knife according to their own style, giving it a more tactical look than the original. The Kiri has a special point designed for precision, while maintaining its distinctive chisel-shaped grind.




The blade of the Extrema Ratio Kiri 04-10000187BLKSW Dark Stonewash, fixed knife measures 6.7 cm in length and 4.8 mm in thickness. The total length is 19.1 cm.



## Blade made of Böhler N690 steel
The blade of the Extrema Ratio Kiri 04-10000187BLKSW Dark Stonewash, fixed knife is made of Böhler N690, a very corrosion-resistant steel from Austria. It is tough and easy to sharpen, even with relatively limited resources. Needless to say, it retains its sharp edge very well.



The blade features a blackwashed finish. For this finish, the blade is first finished with a coating, then tumbled. This makes the blade look like it has been around for a while, kind of like jeans. A big advantage of this is that traces of use will be much less noticeable.



## Handle made of aluminium
This Extrema Ratio Kiri features a handle made from aluminium. Aluminium is very lightweight and easy to machine. This makes it a popular choice for handles. Aluminium comes in many different grades or alloys. For knife handles, most manufacturers use one of the more durable grades, often the same grades used for building aircraft.



The Extrema Ratio Kiri 04-10000187BLKSW Dark Stonewash, fixed knife comes with a sheath made of kydex, a sturdy plastic that will keep the steel safe. However, it is important to keep a kydex sheath clean on the inside. Rinse it regularly with water. This will prevent dirt from remaining in the sheath, which can scratch the blade.



## History of Extrema Ratio
Extrema Ratio was founded in 1997 in Italy. The brand has become famous in the knife world with their tactical knives for the military, police officers and firefighters. The knives, often produced in collaboration with the Italian army, meet the highest military standards. They use materials such as Böhler N690 stainless steel and Forprene handles for comfort and safety, even in extreme conditions.

The range varies from fixed knives like the Requiem to rugged pocket knives like the BF2. Extrema Ratio is ISO 9001 certified and also supplies international military units. Their products are popular among adventurers and professionals worldwide for their reliability and durability. Many of the Extrema Ratio products originate from demand from a government department. In collaboration with that department, they develop a practical knife, a real tool. After this, it is available to everyone, for example here at Knivesandtools.



## Want to personalise your new purchase?

That's possible! We will turn your Extrema Ratio Kiri 04-10000187BLKSW Dark Stonewash, fixed knife into something unique with our engraving machine! Have a name engraved, a date or your personal motto. Additionally, it's also possible to have a logo or other image engraved on a knife. It can be a cool business gift. You could also give it to your wedding party to commemorate the special occasion, or simply to treat yourself.

The process is very simple: you create a design in our [design tool](https://engravingdesign.knivesandtools.com/?lang=en-GB), order the knife and the product [Order with Engraving](/en/pt/-order-with-engraving.htm) and we'll do the rest! Read more about the possibilities [here](/en/ct/engraving-a-fixed-knife.htm).

Extrema Ratio Kiri 04-10000187BLKSW Dark Stonewash, fixed knife

colour

Extrema Ratio Kiri 04-10000187SAT Satin, fixed knife

handedness

blade_finish

handle_material

knife_edge_type

material_sheath

sharpening_type

knife_bladeshape

pocketknife_steel

knife_sheath

value_length

value_weight

value_blade_height

value_blade_length

value_blade_thickness

brand

zm_series

expectedRestockDate

videos

msrp_price

engravable

Personalize it! We can engrave many products. Great as a gift! [Read more about the options here](/en/pt/-order-with-engraving.htm). Looking for an engraving? Don't forget to add the product '[Order with engraving](/en/pt/-order-with-engraving.htm)' to your order. 

Can be engraved

warranty

Almost all the products we sell come with a manufacturing warranty. Want to learn more about the warranty? Read our topic: [warranty explained](/en/ct/warranty-explained.htm)

Warranty

origin

The country of origin is the country the product is produced, as far as we know. This may differ from the country where the brand itself is located.

Country of origin

article_number_site

General information

We always measure the blade height at the highest part of the blade.

Blade height

We always measure the blade length ourselves. This is the length of the blade from the tip to the front of the handle. This may deviate from the manufacturer's specification.

Blade length

value_blade_length_edge

The length of the cutting edge is measured from the tip to the start of the edge. This may deviate from the manufacturer's specification.

Cutting edge length

We always measure the blade thickness at the thickest part of the blade. Often just before the handle. This may deviate from the manufacturer's specification.

Blade thickness

value_handle_length

We always weigh a product as bare as possible. Knives and axes always without their sheath, lights (if possible) without their battery. For knife sets we measure the entire weight. This may deviate from the manufacturer's specifications.

Weight

Dimensions & weight

value_steel_hardness

The hardness in Rockwell C for a knife is always according to the manufacturer's specifications. When a manufacturer specifies a value of 56-58HRC, for instance, we always note the highest value, i.e. 58HRC.

Hardness

Material

fixed_blade_type

knife_best_use

We like to highlight what use the manufacturer had in mind, or what we believe the knife is suited for

Best use

This concerns the type of edge [Want to learn more about a serrated versus a plain edge](/en/ct/pocket-knives-difference-plain-edge-serrated.htm)?

Type of edge

molle_compatible

MOLLE is a mounting system that allows you to attach sheaths and other accessories to backpacks. With this specification we indicate whether a product is already MOLLE-compatible by default. [Want to learn more MOLLE](/en/ct/what-is-molle.htm)?

MOLLE-compatible

In terms of grind we are talking about how the complete blade thickness extends into the edge. Want to learn more about grinds? [Read all about grinds on knives](/en/ct/knife-grinds.htm).

Extrema Ratio Kiri 04-10000187BLKSW Dark Stonewash, fixed knife

Extrema Ratio Kiri 04-10000187BLKSW Dark Stonewash, fixed knife

Full description

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Specifications

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Extrema Ratio Kiri 04-10000187BLKSW Dark Stonewash, fixed knife

Extrema Ratio Kiri 04-10000187BLKSW Dark Stonewash, fixed knife

Extrema Ratio Kiri 04-10000187BLKSW Dark Stonewash, fixed knife

Full description

Specifications

Specifications

General information

Dimensions & weight

Material

Features & functions

Scope of delivery

Recommended combi-deals

Extrema Ratio Kiri 04-10000187BLKSW Dark Stonewash, fixed knife

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