Name: Extrema Ratio Fat Boy Satin, 04.1000.0107/SAT-BLK, fixed knife
Brand: Extrema Ratio
SKU: ER01000-0107-SAT-BLK
Price: 740 EUR
Availability: InStock

The **Extrema Ratio Fat Boy Satin, 04.1000.0107/SAT-BLK** is the most robust fixed knife ever produced by this brand. Made from N690 steel with a hardness of 58 HRC, a thickness of 8.6 mm and a weight of 1 kg, this knife combines impressive thickness with clever design. This design was inspired by the first cleavers, that have been used since ancient times.

The Fat Boy is known for its excellent wear resistance and versatility, making it ideal for both heavy-duty tasks like splitting wood as well as opening windows or doors in case of emergency. Its generous size and unique features make outdoor activities such as chopping and cleaving fun and easy. The blade has as completely flat grind and a tip that functions as protection as well as a lever. Thanks to its shape and width, it is even possible to dig small holes in the ground in emergency situations. The thick and flat back of the blade adds extra mass and can be used as a ‘hammer’, e.g. for tent pegs.



The blade of the Extrema Ratio Fat Boy Satin, 04.1000.0107/SAT-BLK, fixed knife measures 22.6 cm in length and 8.5 mm in thickness. The total length is 34.7 cm.



## Blade made of Böhler N690 steel
The blade of the Extrema Ratio Fat Boy Satin, 04.1000.0107/SAT-BLK, 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.



This knife has a convex grind. This is a special sharpening method where the side of the blade continues in one convex curve to a razor-sharp edge. This sharpening method is often applied by hand in the factory. The great advantage of a convex grind is that it offers the perfect balance between minimal cutting resistance and optimum strength of the edge. You maintain a convex edge [by stropping it]/en/ct/stropping.htm).



The blade of this knife is enhanced with a 'satin finish'. This is a chic and tasteful finish that is very popular.



## G10 handle
The Extrema Ratio Fat Boy Satin, 04.1000.0107/SAT-BLK, fixed knife features a handle made from G10. This is a composite material made of glass fibre and synthetic resin. It is very strong, offers a lot of grip and is comfortable to hold. Moreover, it is not affected by moisture and it is a very stable material. It's an excellent choice for the handle of a fixed 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 Fat Boy Satin, 04.1000.0107/SAT-BLK, 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-US), 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 Fat Boy Satin, 04.1000.0107/SAT-BLK, fixed knife

blade_finish

Extrema Ratio Fat Boy Dark Stonewashed, 04.1000.0107/DKS-BLK, fixed knife

colour

handedness

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

legal_agecheck_key

notforsale

not_replaced_in

expectedRestockDate

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

value_max_belt_width

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 Fat Boy Satin, 04.1000.0107/SAT-BLK, fixed knife