visa-1 united-kingdom-hh paypal-1 metro-card master-card right-arrow-1 euro-hh arrow-down-filled-triangle delivery-truck box front-store search man-user shopping-cart arrows keyboard-right-arrow-button pinterest youtube twitter-logo-silhouette American Express Santa Hat

Extrema Ratio T4000C

18+ Age Restriction Icon

In Stock

Available for Delivery

Extrema Ratio T4000C

test 1Extrema Ratio T4000C Thumbnail Imagetest 2Extrema Ratio T4000Ctest 3test 4
test 1Extrema Ratio T4000C Thumbnail Imagetest 2Extrema Ratio T4000Ctest 3test 4
test 1Extrema Ratio T4000C Thumbnail Imagetest 2Extrema Ratio T4000Ctest 3test 4

Extrema Ratio T4000C

18+ Age Restriction Icon

In Stock

Available for Delivery



Back Order Item

Please note that this item will be dispatched once in stock. We estimate that stock will be here in 4 – 6 Weeks


Extrema Ratio T4000C

Extrema Ratio T4000C



The T4000C continues the purest Extrema Ratio tanto collection, for those who love Japanise profile blades but do not want to waive the typical tactical accessories like handle and sheath. With good balance, simple yet elegant shape the Extrema Ratio T4000C is a well made knife with the usual attention we have come to expect.

The T4000C has been designed for a variety of field tasks such as feathering and light batoning. The modified tanto blade shape makes for a precise cutting tool and excellent EDC knife.

The full tang blade extends beyond the handle to form a lanyard hole.

Extrema Ratio’s distinctive handle design ensures a good grip even with wet hands due to the use of Forprene a rubber of Mil-spec standard. There are no guards allowing you to apply thumb/finger pressure along the spine when required.

Supplied with a MOLLE compatible heavy duty Corudra sheath.


Code ER-04.1000.0434/BLK
Limited Edition: No
Brand: Extrema Ratio
Blade Material: Bohler N690 Stainless Steel
Blade Length (cm): 10.4
Blade Thickness (cm): 0.4
Overall Length (cm): 20.8
Handle Material: Rubber
Handle Material (Text): Forprene TPE
Blade Coating: MIL-C-13924 BURNISHING
Blade Finish: Black
Blade Hardness (HRC): 58
Blade Shape: Tanto
Blade Type: Plain
Cutting Edge (cm): 9.3
Grind: Flat
Sheath: MOLLE Compatible Cordura
Product Weight (g): 196


  1. The must have compact knifeReview by
    This is one stunning must have compact knife, that punches well above its weight. Before purchase I thought its short blade length might be a touch small; however this is what makes this knife so darn good. The balance in hand is simply unreal and the design of both the knife & the sheath are outstanding. Once the press studs have bed in it becomes a cinch to draw and stowe. Easy to attach to any belt or load out. When worn at the hip the lenght of the sheath stays close to that of the knife which rides just right, especialy if you're in and out of vehicles. Sharpest OTB factory knife I have EVER bought! Having abused and used this tank of a knife for the past six month it has rapily become one of my favourites. I had not owned an ER blade before but I am now a huge fan a follower of their work ;-) (Posted on )

Write Your Own Review

You're reviewing: Extrema Ratio T4000C

How do you rate this product? *

  1 2 3 4 5

Questions & Answers

Need This Item Fast?

For an extra fee you can get this item for Tuesday 14th July 2020

257 In Stock

You may also be interested in the following product(s)

What is this?

*Please note this service is in the Beta stage so you may receive messages that are unrelated to your chosen categories.

Get the latest news and products updates with Heinnie’s Push Notification service!

This service is a handy tool that keeps you up-to-date with all the latest news and offers that Heinnie has to offer! You’ll receive instant notifications about Heinnie news, such as:

Brand new items to Heinnie Haynes
Item re-stock
Special offers
And more!

Once subscribed, you can pick and choose what categories you receive notifications for, making it personal to you. You can even turn the notifications on and off, at the flick of a switch.

Fancy receiving instant Heinnie® notifications? Be the first to know about our offers, product updates and much more

Send me messages related to:

  • Apparel

  • Carry

  • Knives & Tools

  • Lighting

  • Shelter

  • Survival

  • Urban Survival

  • Watches

Personal Subscriptions:

  • Mass Message

  • Abandoned Cart