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Discover our advantages:

1) Superior quality: Extrema Ratio products are made with the highest quality materials and follow rigorous production standards, ensuring durability and reliability over time.
2) Specialization: The company boasts a long experience in the defense sector, offering products specifically designed to meet the needs of professionals and enthusiasts.
3) Made in Italy: By purchasing an Extrema Ratio product you choose a product of excellence, entirely made in Italy, supporting craftsmanship and the national industry.

We also deal with: Cutting weapons, Military equipment and Diving knives



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Haven't found the solution for your defense yet? The answer to your problems is Extrema Ratio.

Extrema Ratio offers a wide range of products and services for the defense sector, ensuring the highest quality and reliability. The company specializes in the import of weapons and accessories, the production of specific accessories and the supply of reactive ballistic targets.

1° Needs Identification

It is essential to request all the necessary information, such as technical sheets, certifications, stock availability and prices.

2° Analysis of the offer

Once you have received the proposal, it is important to carefully evaluate it in every aspect, comparing it with your needs and with the offers of other suppliers.

3° Purchase and After-Sales Assistance

If necessary, you can contact the after-sales assistance service of Extrema Ratio to obtain technical support or solve any problems.


Wide range of products available to satisfy every need. Simple online or in-store purchasing procedure. Fast and safe delivery worldwide. Dedicated customer service for any need.


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resolza 12 knives

resolza 12 knives

Extrema Ratio offers a complete solution for those looking for high quality products in the defense sector.

Our offer includes:

  • High quality products: Knives, accessories, weapons and ballistic targets.
  • A wide range of premium tactical knives designed for military, law enforcement, and outdoor survival.
  • Innovative multi-functional tools, ideal for extreme environments and diverse operational needs.
  • Customizable options, tailored to meet specific professional requirements.

You will benefit this and that:

  • Top-tier materials, such as Böhler N690 steel and Forprene, ensuring durability and reliability.
  • Italian craftsmanship, renowned for precision and attention to detail.
  • Products that undergo rigorous testing to guarantee maximum performance in challenging conditions.

Our product line consists of:

  • Cutting-edge designs created to provide efficiency, safety, and versatility.
  • Support from a worldwide network of retailers and service providers, ensuring assistance wherever you are.
  • A commitment to excellence, offering tools that are trusted globally by professionals in demanding fields.
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Resolza 12 knives

Extrema Ratio, an Italian company famous for its premium knives, offers a diverse range of products tailored to multiple uses. Our catalog includes tactical, fighting, outdoor, and survival knives, all of them designed with precision and resilience in mind. Beyond knives, we also provide accessories such as modular racks, tactical storage, and care equipment, catering to both professional and collector users. Our blades are preferred by military personnel, security forces, and explorers worldwide, thanks to our trustworthiness and cutting-edge designs. Extrema Ratio's commitment on artistry and engineering excellence ensures that every product maintains top performance, even in the toughest situations.

Highlighted Blades: Proof of Superior Craftsmanship and Efficiency

Among our standout offerings is the Requiem Black, a ultra-light, multipurpose tactical knife. This single-edged stiletto features a single guard and comes with a ergonomic Aspis nylon sheath, ensuring both practicality and convenience. Another popular product is the Satre Stone Washed, a small but mighty yet solid full-tang blade. Its design makes it ideal for a wide range of applications, from everyday tasks to more demanding missions. For those seeking a trustworthy pocket knife, the MF1 Last Call is noteworthy. Praised for its user-friendly structure and top efficiency, it has earned a reputation for dependability and resilience among customers. Additionally, the RAO II, a heavy-duty folding knife, is engineered to endure extreme conditions, making it a top choice for bushcraft experts.

Engineering Design: The Art Behind Extrema Ratio Knives

The brand's dedication to superior standards is unmistakable in its detailed development and fabrication methods. Each product passes through intensive testing to ensure it meets the elite benchmarks of effectiveness and strength. The company consistently invests in R&D, incorporating high-tech resources and user-friendly features to optimize practicality. This commitment has reinforced its reputation as a renowned provider of professional-grade knives and accessories. Whether for combat scenarios, survival challenges, or regular application, Extrema Ratio products stand as a testament to exceptional engineering, offering top-tier excellence, practical benefits, and toughness in each blade.

You may be interested in:
Resolza 12 knives | Resolza 8 knives

Our numbers

300+
Product

100.000+
Satisfied Customers

50+
Resellers Store

They Say About Us... Testimonials

The opinions and experiences of those who have already tried our solution.

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Available even during closing hours

One of the bests manufacturer. Consistent proven quality. Great ergonomic handle design. I love their products for decades. At the beginning their products were just a dream for me. But now i am a collector and field user. When i am out, some of their products are with me beside of others. But 1-2-3 Extremas are always represented. If just one blade would be possible, that will be Extrema for me. The big Q is which one

It is an all-Italian pride!

It has a professionalism that other companies dream about at night. I have been using ERs for years and they have never let me down. Five-star after-sales service. I sent a RAO back to the factory with worn pins problems and ruined blade due to Dell use, they returned it to me in better condition than when it was new! THANK YOU1000 ALWAYS NUMBER 1!

Extrema ratio amazed me and not a little!!!

I pointed out via email a sleeving problem and the next day I was contacted by phone directly by the sales manager.....no small feat for a company of this caliber!!! Very nice person friendly and affable...solved the problem with professionalism and seriousness.... Basically I get my knife changed without setting foot out of the house and at no extra charge ,via courier...... Thank you Extrema ratio and congratulations again!!!!!


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Some of our products

These are some products that we have made for our customers to solve the quality and efficiency problems required.

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Neck Knives
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Diving Knives
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Karambit
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Survival Knives

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Innovation and Mastery: Our Vision and Production

Extrema Ratio combines a vision focused on innovation and maximum reliability with manufacturing that combines Italian craftsmanship, the highest quality materials, and advanced technologies to create elite instruments capable of tackling the most extreme challenges.

resolza 12 knives

Vision

Our philosophy is to produce technical equipment of excellent functional value, long operational life and quality consistency. These factors, over time, have become witnesses of our philosophy, based on the quality and uniqueness of each individual piece. Our products are professional technical tools, designed and built to solve problems.

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Production

There are unique lines that characterize and distinguish our production. The high level of quality is given by the functionality of the projects, the choice of the best materials and the most modern treatments applied to our knives. We produce few items because we believe in their peculiarity; each one of these is designed for a specific use.

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resolza 12 knives

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FAQ - Frequently Asked Questions

All the complete answers to the most frequently asked questions about our products.

What materials are used to produce Extrema Ratio knives?

Extrema Ratio knives are crafted using the highest quality materials. The blades are made from premium steels such as N690, known for their exceptional strength, corrosion resistance, and edge retention. For the handles, we use innovative materials like Forprene, which ensures durability, ergonomic comfort, and resistance to extreme conditions.

Are Extrema Ratio products also suitable for hobby use?

Absolutely! Extrema Ratio products are designed to meet the needs of both professionals and enthusiasts. Whether you are camping, trekking, or engaging in survival activities, our knives and tools offer exceptional performance, reliability, and safety, making them perfect for outdoor hobbies.

How can I place an order?

You can conveniently place an order through the official Extrema Ratio website, ensuring access to our complete catalog and exclusive offers. Additionally, our products are available at a wide network of authorized retailers worldwide. Check our website to find the nearest retailer.

What are the delivery times?

Delivery times depend on the destination and the product chosen. Typically, orders are processed quickly to ensure timely shipping. For international orders, delivery times may vary based on local logistics. Once your order is placed, you will receive updates with tracking information for your shipment.

Do you offer after-sales service?

Yes, Extrema Ratio provides a comprehensive after-sales service to assist you with any needs. Our global network of authorized retailers and service centers ensures that help is always within reach. Renowned for reliability and excellence, Extrema Ratio is trusted by customers worldwide, offering prompt support and solutions for your satisfaction.

Can I customize my products?

In some cases, product customization is available. Whether you're looking to personalize your knife with specific engravings or require special modifications, our customer service team is here to assist. Contact us directly for more information on the customization options available.

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Extrema Ratio S.R.L.
Traversa delle Ripalte,72/78
59100 Prato (PO), Italy
vat: 02481870976

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