- Orso Carbon Fiber Stonewashed exquisite design by Danish knifemaker Jens Anso. A slim knife that opens with a quick flipper flipper assisted by a ball bearing system. An improved version of the Orso knife with Lohmann LO-QPM 20-4 stainless steel blade.

This product is intended for use only by adults with knowledge and experience in handling sharp cutting tools. Improper use of the knife can result in serious injuries. The blade is extremely sharp and can easily cut through skin and tissue; therefore, extra caution should always be exercised while cutting, and hands should be kept away from the cutting edge. To prevent the knife from slipping, it is recommended to cut on a stable, non-slip surface and avoid excessive force, which may cause uncontrolled blade movement.
Leaving the knife on the edge of a table, countertop, or in easily accessible places—especially where children are present—poses a significant safety risk. The knife should always be properly secured after use, ideally by placing it on a stable surface or storing it in designated knife blocks, protective sheaths, or magnetic strips. The knife should never be used for tasks it is not designed for, such as opening cans or prying objects, as this can damage the tool and lead to dangerous accidents.
A dull blade increases the risk of injury, as it requires more force and is more likely to slip from the material being cut. Therefore, it is essential to sharpen the knife regularly to maintain optimal sharpness. Additionally, proper cleaning and drying of the knife are necessary to prevent corrosion and bacterial growth. Periodic inspection of the handle and blade is recommended to check for cracks, chips, or looseness. If any damage is detected, the knife should be repaired or replaced immediately.
When using the knife, focus solely on the task at hand—avoid talking on the phone, watching television, or other distractions while cutting. Ensure proper lighting in the workspace for better visibility and control. Please note that some countries or regions have laws restricting the ownership and carrying of knives. Before purchasing or using this knife, verify that its use is legal in your location according to applicable regulations.
Following these safety guidelines will help ensure safe and effective knife use, minimizing the risk of accidents and extending the lifespan of the tool.
The Orso Carbon Fiber, Stonewashed design by Danish custom knife maker Jens Ansø is an outstanding example of the design principles of 'where form follows function' quickly becoming the template for the ideal E.D.C. knife for many blade enthusiasts. Sleekly opened by a ball-bearing-assisted fast flipper flipper system, the folder combines utility with the cutting-edge technologies and craftsmanship for which the Viper brand is renowned. An upgraded version of the Orso folder with a Lohmann LO-QPM 20-4 stainless steel blade.
Steel
LO-QPM 20-4 - modern high-speed tool steel. High wear resistance and high working hardness, about 59-61 HRC. Sourced from Lohmann, the equivalent of M390 or CPM 20CV steel.
Blade
Versatile Drop Point blade with clearly marked belly finished in Stonewashed method masking scratches. Despite the thickness of the blade the high, full flat grind gives excellent cutting properties combined with extreme durability. A ball bearing system assists in the smooth opening of the blade, which can be opened with a quick flipper. Flipper consists of a small lever (protrusion) protruding beyond the back of the handle when the head is closed. In the open position it serves as a hilt, protecting the hand from slipping on the blade.
Handle
Robust Carbon Fiber facings (carbon fiber pressed under pressure with synthetic resin) screwed to the CNC milled titanium backspacer, which means practical indestructibility of such construction. The backspacer and the decorative ring around the pivot collar are made of blue anodized titanium. Right-side, one-position titanium deep carry clip allows you to carry the knife discreetly in tip-up position. Backspacer with lanyard hole, an elongated hole for a belay or decorative cord.
Technical data:
Product number: V 5966 FC
Product name: Orso Carbon Fiber, Stonewashed
Overall length: 208.0 mm / 8.2"
Blade length: 87.0 mm / 3.4"
Handle length: 121.4 mm / 4.78"
Blade thickness: 4.0 mm / 0.16"
Handle thickness: 11.63 mm / 0.46"
Weight: 85.0 g / 2.99 oz
Blade material: LO-QPM20-4
Blade hardness: 59-61 HRC
Blade grind: Full Flat
Blade finish: Stone Washed
Handle material: Carbon Fiber
Handle finish color: Black
Backspacer material: Titanium GR2, CNC machining and blue anodized
Backspacer color: Blue
Clip: Right, Tip-Up
Clip material: Shaped Titanium GR.5
Pivot mechanism: Ball bearings
Lock: Liner lock
Designer: Jens Anso
Brand name: Viper
Manufacturer: Tecnocut SNC, Italy
Developed by Sharg® company