PREVIOUSLY PURCHASED KNIFE, FROM A PRIVATE COLLECTION
* Origin: Acquired from a private seller, previously purchased
* Condition: Overall in excellent condition; opened and closed only a handful of times; never used for cutting
* Available on the market: Available
* Sharpening: Factory-sharpened
* Marks on blade: None
* Marks on handle: Minor marks on the handle’s anodized finish, near the release pins
* Box: Present and complete
* Sheath: /
* Manuals, Certificates, and Warranties: Present
* Inspected and Certified by our in-house laboratory

The Extrema Ratio RAO C is a compact folding knife derived from the iconic RAO II.

Thanks to its design, the RAO C is a tool that, despite its small size, manages to guarantee the same robustness and reliability as its larger counterpart while offering improved portability and handling.

The handle consists of two finely crafted anodized aluminum scales, to which Extrema Ratio applies a hard-anodizing treatment, making the handle more resistant to wear and corrosion.

Two steel frames help increase the handle’s sturdiness to withstand the most demanding uses.

The opening lock mechanism is particularly durable, as it is supplemented by a safety system that transforms it into a true fixed blade. The primary safety on the blade is activated by lifting and lowering the locking pin. To ensure maximum safety for the user, a practical and quick secondary safety has been added, which can be activated simply by moving the locking pin horizontally.

The reversible clip is designed to allow for concealed carry in a pocket, making the knife invisible from the outside.

The blade is made of Böhler N690 steel, hardened to 58 HRC, with the classic Extrema Ratio MIL-C-13924 black finish.

To lighten the steel frames, a laser-cut template based on the RAO C profile was created, which was then used to make a gadget included with the knife.

Intended use: Hiking / Tactical

Production type: industrial
Country of manufacture: Italy
Blade: N690Co stainless steel 58HRC
Blade finish: MIL-C-13924 burnishing
Handle: hard-anodized anticorodal
Blade length: 100mm.
Blade thickness: 4mm.
Closed length: 132mm.
Overall length: 225mm.
Weight: 239g.
Closure: Modified front lock, with additional push-button safety
Notes: Keychain gadget, featuring a miniature profile of the knife—a previously purchased knife from a private collection

Extrema Ratio – Made in Italy Tactical Excellence

Extrema Ratio is an international reference in professional tactical cutlery, official supplier to the Italian and French Armed Forces (NATO Code AD856). Every knife is designed for real operational use: selected materials, advanced treatments, and artisanal finishes guarantee robustness, precision, and reliability in all conditions.

Coltelleria Collini Guarantee: We have been a historic official Extrema Ratio dealer for over 25 years. We offer dedicated support, immediate availability, previews, and a catalog always updated with all the latest productions.

➡ Discover Extrema Ratio history, models, and news on our dedicated page