Name: Extrema Ratio BD4 R Black, 04.1000.0496/BLK, pocket knife
Brand: Extrema Ratio
SKU: ER04-1000-0496-BLK
Price: 190 EUR
Availability: OutOfStock

Spyderco Stok Drop Point FB50GPOD OD Green G10 fixed knife, Sjoerd Stok design

legal_agecheck_key

notforsale

not_replaced_in

msrp_price

Extrema Ratio BF3 Dark Talon

Extrema Ratio BD2 R, Satin 04.1000.0227/SAT pocket knife

Spyderco Stok Bowie FB49GPOD OD Green G10 fixed knife, Sjoerd Stok design

Extrema Ratio MK2.1 Black

Spyderco Subway Bowie FB48PBK, FRN, pocket knife

Benchmade SOCP 4.5 391BK pocket knife, Greg Thompson design

CRKT CEO Flipper 7097 pocket knife, Richard Rogers design

Spyderco Para 3 Light-weight C223PBK FRN CTS-BD1N pocket knife

Spyderco Paramilitary 2 Black C81GPBK2 pocket knife

Spyderco Slysz Spydie Chef C211TIP pocket knife, Marcin Slysz design CQI Version

Spyderco Manix 2 Lightweight C101PBK2 pocket knife

strike_price

Spyderco ARK Salt FB35PBK neck knife

Böker Plus Kwaiken Air Mini G10 All Black 01BO329 pocket knife, Lucas Burnley design

Cold Steel Counter TAC I10BCTL dagger

CRKT Xolotl 2265 pocket knife, Michael Rodriguez design

Extrema Ratio MK2.1 Desert Warfare

Civivi Circulus C22012-2, Stonewashed 10Cr15CoMoV neck knife, Ostap Hel design

Spyderco Police 4 Light-weight C07PBK4 pocket knife

SOG SOG-TAC XR Blackout 12-38-01-57 pocket knife

Ballistol maintenance oil, 50 ml

productlabel

Skerper Professional sharpening set 220/1000/2000/5000, dressing stone + holder

Skerper Pocket Strop STP002, stropping paddle

Sentry Solutions-Marine Tuf-Cloth

Fallkniven Diamond Ceramic Whetstone DC4

Knivesandtools 550 paracord type III, colour: black, 100 ft (30.48 m)

Extrema Ratio TK Tool 2.0, black

Extrema Ratio N.K.3 necker, black

Extrema Ratio N.K.2 necker, black

Skerper Pocket Stone diamond/ceramic sharpening stone, SO003

Extrema Ratio N.K.1 Neck knife - Black

Extrema Ratio TK Tool 2.0, clear

Extrema Ratio BF1 Classic Drop, pocket knife

The **Extrema Ratio BD4 Black** is a slim, elegant pocket knife. As a result, you can easily carry this knife with you all day, yet it's still suitable for heavy tasks if needed. The BD4 embodies the classic Italian knife style; with the slimness of a stiletto and with tactical usability thanks to the high-quality materials and a large flipper. Once opened, a liner lock will lock the blade securely in place.

## Extrema Ratio BD4 blade

The blade is made from Austrian Böhler N690 steel. This is a stainless steel with great sharpness retention that is also used for surgical tools. N690 is highly durable and can be sharpened until razor sharp.

## Extrema Ratio BD4 handle

The handle is made from anodized anticorodal aluminium. It is lightweight and seriously solid. During anodizing, an extra layer is applied to the aluminium. This makes the handle even more corrosion-resistant. The aluminium has several notches for a good and comfortable grip.


Extrema Ratio BD4 R Black, 04.1000.0496/BLK, pocket knife

brand

colour

handedness

blade_finish

opening_system

handle_material

knife_edge_type

multitool_tools

sharpening_type

knife_bladeshape

pocketknife_lock

pocketknife_steel

pocketknife_onehanded

value_multitool_tools_number

knife_sheath

value_weight

value_blade_height

value_blade_length

value_opened_length

value_blade_thickness

expectedRestockDate

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_closed_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

Material

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

pocket_blade_type

pocketknife_clip

pocketknife_clip_position

pocketknife_clip_side

This is the type of lock used. There are many different types of locks that are used by many different brands. [Want to learn more about locks](/en/ct/locking-mechanisms-on-pocket-knives.htm)?

Lock

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 BD4 R Black, 04.1000.0496/BLK, pocket knife

Extrema Ratio BD4 R Black, 04.1000.0496/BLK, pocket knife

Full description

Specifications

Also popular

Specifications

General information

Dimensions & weight

Material

Features & functions

Extrema Ratio BD4 R Black, 04.1000.0496/BLK, pocket knife

Extrema Ratio BD4 R Black, 04.1000.0496/BLK, pocket knife

Extrema Ratio BD4 R Black, 04.1000.0496/BLK, pocket knife

Full description

Specifications

Also popular

Specifications

General information

Dimensions & weight

Material

Features & functions

Extrema Ratio BD4 R Black, 04.1000.0496/BLK, pocket knife

Relevant topics