
Details
KNIFE PREVIOUSLY PURCHASED AND USED, FROM A PRIVATE COLLECTION
* Origin: Purchased from a private individual, previously owned and used
* Condition: Excellent mechanical condition, good cosmetic condition (a few small marks on the aluminum handle and a few small spots of oxidation on the blade)
* Commercially available: Available on the market
* Sharpening: Professionally resharpened
* Marks on blade: Small spots of oxidation and minimal polishing of the blade’s finish due to use
* Marks on the handle: 2–3 small scuffs on the aluminum handle
* Box: Included
* Sheath: -
* Manuals, Certificates, and Warranties: Included
* Inspected and certified by our in-house laboratory
The BF2 is a “full-size” folding knife particularly suited for professional use by military and law enforcement personnel in the field. The handle is sturdy and comfortable; the reversible, wraparound clip serves as a useful and comfortable thumb rest in the “reverse grip” position. The handle scale is solid with the characteristic recessed surfaces designed to engage the opening pins without them protruding from the knife’s closed profile. The blade, available in either a drop-point or tanto configuration, features a flat grind and, like the BF1, a particularly thick and durable tip. The blade locking mechanism is the proven LINER-LOCK, supplemented by a manually operated safety mechanism protected by a guard.
Intended Use: Tactical/Military
Production Type: Industrial
Blade: N690Co stainless steel, 58 HRC
Country of Manufacture: Italy
Handle: Anticorodal
Blade Length: 90 mm.
Blade thickness: 3 mm.
Closed length: 124 mm.
Overall length: 210 mm.
Weight: 142 g.
Closure: Liner Lock with additional safety lock operable when the knife is open
Clip: Reversible and removable stainless steel clip
Notes: Previously owned and used 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
ExtremaRatio - BF2CT - Stone Washed N690Co - USED - PRIVATE COLLECTION - knife
Details
KNIFE PREVIOUSLY PURCHASED AND USED, FROM A PRIVATE COLLECTION
* Origin: Purchased from a private individual, previously owned and used
* Condition: Excellent mechanical condition, good cosmetic condition (a few small marks on the aluminum handle and a few small spots of oxidation on the blade)
* Commercially available: Available on the market
* Sharpening: Professionally resharpened
* Marks on blade: Small spots of oxidation and minimal polishing of the blade’s finish due to use
* Marks on the handle: 2–3 small scuffs on the aluminum handle
* Box: Included
* Sheath: -
* Manuals, Certificates, and Warranties: Included
* Inspected and certified by our in-house laboratory
The BF2 is a “full-size” folding knife particularly suited for professional use by military and law enforcement personnel in the field. The handle is sturdy and comfortable; the reversible, wraparound clip serves as a useful and comfortable thumb rest in the “reverse grip” position. The handle scale is solid with the characteristic recessed surfaces designed to engage the opening pins without them protruding from the knife’s closed profile. The blade, available in either a drop-point or tanto configuration, features a flat grind and, like the BF1, a particularly thick and durable tip. The blade locking mechanism is the proven LINER-LOCK, supplemented by a manually operated safety mechanism protected by a guard.
Intended Use: Tactical/Military
Production Type: Industrial
Blade: N690Co stainless steel, 58 HRC
Country of Manufacture: Italy
Handle: Anticorodal
Blade Length: 90 mm.
Blade thickness: 3 mm.
Closed length: 124 mm.
Overall length: 210 mm.
Weight: 142 g.
Closure: Liner Lock with additional safety lock operable when the knife is open
Clip: Reversible and removable stainless steel clip
Notes: Previously owned and used 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
Specifications
| Brand | Extrema Ratio |
|---|---|
| Manufacturer information | Extrema Ratio S.R.L. Via Traversa delle Ripalte,72/78 59100 Prato Italy https://extremaratio.com |
| Country of production | Italy |
| Blade Type | Folding |
| Blade Length | 9/10cm |
| Edge | Plain |
| Blade Tip | Tanto |
| Blade thickness | 3 mm |
| Blade Finish | None (Satin / Stonewashed) |
| Stainless Steel | N690Co |
| Handle Material | Metallic |
| colour | black |
| Locking Type | Liner Lock |
| Opening system | Thumbstud |
| Materials and Finishes | 7,5 |
| Steel Quality | 7,5 |
| Strength | 7,5 |
| Practicality | 7,5 |
| Aesthetic | 8 |
| Quality/Price | 7,5 |
| Downloadable Catalog |





























