FOX Saturn Flipper Knife Black G10, Black Stonewashed N690Co by Denis Simonutti (FX-551 G10B)

FOX Saturn Flipper Black G10, Black Stonewashed N690Co by Denis Simonutti – a compact folding knife with a Radius Lock

The FOX Saturn Flipper FX-551 G10B is a compact folding knife designed by Denis Simonutti, which builds on the award-winning Saturn design with a convenient flipper opening mechanism. The model retains the design’s characteristic symmetry and the patented Radius Lock, combining them with an N690Co steel blade and a black G10 Handle.

The G10B variant features a blade coated with black Idroglider finish with a stonewashed effect, black AISI 303 steel components, and a contrasting brown-anodized aluminum clip. In 2021, the Saturn won the titles of Overall Knife of the Year and Imported Knife of the Year, becoming one of FOX Knives’ most recognizable designs.

N690Co – Stainless Steel for Everyday Use

The blade is made of N690Co stainless steel hardened to 58–60 HRC. The material effectively combines corrosion resistance, durability, and the ability to achieve a sharp edge, making it ideal for a compact folding knife designed for regular EDC tasks.

Symmetrical blade and black Idroglider finish

The Saturn’s distinctive blade draws inspiration from the classic dagger and harmonizes with the symmetrical lines of the entire knife. The black Idroglider coating has been further finished with a stonewashed treatment, which gives the surface a dark, technical look and visually minimizes the appearance of minor signs of everyday use.

Black G10 handle

The grips are made of black G10, a material that withstands moisture and heavy use well. The handle profile is designed to complement the symmetrical styling of the knife, and its distinct taper and guard near the blade help maintain a controlled grip during use.

Radius Lock – FOX Knives’ signature lock

Radius Lock is the central element of the Saturn’s design. The mechanism is operated by a button that moves along an arched track in the Handle, allowing you to conveniently unlock the blade while maintaining the knife’s distinctive, symmetrical form.

The lock button is made of AISI 303 stainless steel and coated with a black Idroglider finish. The structural screws feature the same finish, ensuring that the mechanical components remain stylistically consistent with the blade and the black handle.

Flipper – Faster and More Intuitive Opening

In this version, the Saturn is equipped with a flipper, which complements the Radius Lock mechanism and allows for quick manual opening of the blade. This solution builds on the original Saturn concept, preserving its distinctive mechanics while simplifying everyday use.

Brown Clip and Steel Backspacer

The clip is made of anodized aluminum in a brown color that contrasts sharply with the black handle. The AISI 303 stainless steel backspacer has a black finish and visually blends with the other dark elements of the design.

Saturn sheath and patch included

The knife comes with a nylon sheath and a Saturn patch. The sheath makes it easy to store and carry the knife outside your pocket, while the patch serves as an additional element associated with the recognizable FOX Knives series.

Why Choose the FOX Saturn Flipper FX-551 G10B?

The FOX Saturn Flipper combines the unique Radius Lock with compact dimensions, N690Co steel, and a practical G10 handle. The flipper mechanism makes opening the knife easier, the black finish gives the design a cohesive look, and the brown clip serves as a distinctive stylistic detail.

This model also holds a significant place in the brand’s history—the Saturn design was honored in 2021 with the titles Overall Knife of the Year and Imported Knife of the Year. As a result, this model will appeal to both users looking for an unconventional EDC folder and collectors of contemporary FOX Knives designs.

Key Features at a Glance

• N690Co – stainless steel hardened to 58–60 HRC.
• Black Idroglider stone washed – black blade finish with a stonewashed effect.
• Radius Lock – distinctive, patented locking system.
• Flipper – quick manual blade opening.
• Black G10 – durable handle grips.
• AISI 303 – stainless steel for the lock button, screws, and backspacer.
• Brown clip – anodized aluminum in a contrasting color.
• Designed by Denis Simonutti – Saturn’s distinctive, symmetrical form.
• Nylon sheath and Saturn patch – accessories included with the set.
• 2021 Awards – Overall Knife of the Year and Imported Knife of the Year.

Technical data

Frequently Asked Questions

How does the Radius Lock work on the FOX Saturn?

The Radius Lock uses a button that moves along an arched path in the center of the handle. The mechanism allows the blade lock to be released in a manner characteristic of the Saturn design and is one of the most important elements of Denis Simonutti’s design.

How do you sharpen N690Co steel?

N690Co responds well to high-quality ceramic and diamond sharpening systems. It’s best to maintain a consistent sharpening angle and regularly touch up the edge before it becomes significantly dull.

How to care for an N690Co blade with an Idroglider coating?

After use, it’s a good idea to remove dirt and moisture from the blade and then dry it. Avoid harsh abrasives, which could unnecessarily wear down the black coating and alter the stonewashed finish.

What does the flipper change in this version of the Saturn?

The flipper provides an additional, direct way to manually open the blade. This makes operation quick and intuitive, while retaining the distinctive Radius Lock mechanism.

What’s included with the FOX Saturn FX-551 G10B?

In addition to the knife, the set includes a nylon sheath and a Saturn patch. The sheath can be used to store and carry the folder outside your pocket.

Prepared by: Specialists at Sharg® company – Your expert in EDC and cutting tools