Name: Extrema Ratio Ultramarine Con Asola Diving Knife
Brand: Extrema Ratio
SKU: ER320ULTRAC
Price: 7533 SEK
Availability: InStock
Rating: 9 (2 reviews)

Ballistol maintenance oil, 50 ml

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Knivesandtools #EveryDayCloth, micro-fibre cloth

Nano-Oil 10w maintenance oil 8cc/8ml

Knivesandtools #OneKnifeStand, knife stand

Wera Kraftform Micro 6-piece screwdriver set with holder, 5118150001

Wera Tool-Check automotive 1 bit- and cap set metric, 5200995001

Wera Kraftform Micro 12-piece screwdriver set, 5073675001

Wera Rapidaptor bit holder with handle, 5051272001

Wera Bit-Check 10 Torx universal 10-piece Torx set, 5057115001

Wera Tool-Check PLUS bit- and cap set imperial, 5056491001

Skerper Pocket Strop STP002, stropping paddle

Skerper Basic sharpening pen with a diamond steel, SO001

Skerper Pocket Stone diamond/ceramic sharpening stone, SO003

Extrema Ratio TK Tool 2.0, black

Extrema Ratio N.K.1 Neck knife - Stonewashed

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Extrema Ratio N.K.1 Neck knife - Black

Extrema Ratio TK Tool 2.0, clear

Extrema Ratio N.K.1 Neck knife - Desert Warfare

Wera Bit-Check 12 metal 1, 12-piece bit set, 5057424001

Wera Bit-Check 30 Metal 30-piece bit set, 5057434001

Lansky Masters Edge Sharpener, MEDGE1

DMT Diafold conical sharpening steel, FSKF

DMT Diafold conical sharpening steel, FSKC

DMT Diafold conical sharpening steel, FSKE

Fixed blade knife, developed in collaboration with military dive teams and civilian underwater operation  experts. The Ultramarine model is particularly suitable for use underwater and under challenging and hard conditions.

The **Extrema Ratio Ultra Marine Con Asola** is a luxurious diving knife, developed in collaboration with military and civil diving teams. It is ideally suited for use underwater and in difficult and challenging conditions.

The main goal of the Ultramarine project was to make several tools obsolete by having one versatile tool. The blade has two cutting edges, one side of which is partially serrated. The mass of the blade is heavy enough to chop effectively. The back can be used as a hammer or glass breaker. This knife has a special line cutter. 

There is a recess in the blade that makes it easy to open oxygen bottles and shackles.

The handle offers an enormous amount of grip. It is made of fibre-reinforced nylon (FRN) and offers unprecedented grip, especially when using neoprene gloves. The shape has also been designed so that it's always easy to determine the position of the knife under poor light conditions.

The design of the holster means it stays tight against the body. A special flap prevents damage to equipment while using the Ultramarine. The knife is always ready for use in a flash. A diamond sharpening stone is stored in the holster.

If you prefer, you can remove the Kydex insert from the nylon sheath and hang it on your belt with one or two Tek-Lok-like clips (included). The Ultramarine also feels right at home on land.

Because a diving knife gets exposed to exceptionally corrosive conditions, the danger of rust is always lurking. Extrema Ratio has opted for an extremely corrosion-resistant steel, namely Böhler N690, but (long-term) exposure to saltwater can always cause extra rust. That's why the blade has a premium coating. As a result, only the edge is at risk of corrosion. For this reason, the knife comes with an eraser that can quickly remove most rust spots. You can sharpen the edge with the supplied diamond sharpener. This is another way to remove rust from the edge.

Naturally, a knife of this quality comes in a good case, so you can store the sheath and all the accessories together.

Extrema Ratio Ultramarine Con Asola Diving Knife

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material_sheath

sharpening_type

knife_bladeshape

sharpening_angle

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knife_sheath

value_length

value_weight

value_blade_height

value_blade_length

value_blade_thickness

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reaction

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authorCity

Produit correct, on sent la qualité des matériaux sélectionnés, finition trés propre.
Seul bémol la tranche de la lame qui m a forcé a le porté chez un coutelier pour reprendre le fil car le tranchant n est pas au rendez vous hélas.
Pour ceux qui on perdu plusieurs dagues sous l eau, rassurez vous avec celle ci ca n arrivera plus.

Yann

Très bonne finition et qualité. Bien adapté aux environement submarines, manche très adaptée.
Un bon produit Extrema Ratio.

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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

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

We measure the sharpening angle ourselves. This value is the angle per side.  So 20º means that the total angle of the edge is 40º. Please note that knives are almost always sharpened by hand, even in factories. This value is therefore only an indication of a single tool measured by us. You are always free to choose your own sharpening angle. [Learn more about sharpening angles](/en/ct/sharpening-angles-explained.htm).

Sharpening angle

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 Ultramarine Con Asola Diving Knife

Extrema Ratio Ultramarine Con Asola Diving Knife

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Extrema Ratio Ultramarine Con Asola Diving Knife

Extrema Ratio Ultramarine Con Asola Diving Knife

Extrema Ratio Ultramarine Con Asola Diving Knife

Full description

Specifications

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Specifications

General information

Dimensions & weight

Material

Features & functions

Scope of delivery

Recommended combi-deals

Extrema Ratio Ultramarine Con Asola Diving Knife

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