Extrema Ratio Panthera Black Knife - Wharncliffe Böhler N690 Blade, Razor Opening

Overview

Born from the development of the famous T-Razor, the Extrema Ratio Panthera Black takes on the aesthetics of the traditional straight razor in a modern, all-black folding knife. Its Wharncliffe-style blade, with a curved profile evoking a claw, offers remarkable cutting power for everyday tasks as well as tactical use. Made in Italy with selected materials and careful finishing, it stands out for its distinctive look and robustness.

Technical Specifications

• Blade: Böhler N690 steel (58 HRC) - a cobalt-alloyed stainless steel renowned for its excellent edge retention and corrosion resistance
• Blade profile: curved Wharncliffe, claw type - maximizes cutting power across many tasks
• Blade finish: MIL-C-13924 black bluing - discreet and durable surface protection
• Edge: razor-sharp, plain (non-serrated) - clean, precise cuts right out of the box
• Blade length: 100 mm - Thickness: 3 mm
• Total length: 247 mm for a weight of 132 g - a large knife that remains manageable
• Handle: anodized anticorodal aluminum, with integrated glass breaker
• Locking mechanism: liner lock - reliable holding of the blade in the open position
• Opening: manual, high-speed Razor system via extended tang (razor-style flipper)
• Origin: made in Italy by Extrema Ratio

Advantages

• Versatile grip: the long handle allows for multiple grip positions and remains comfortable, even with gloves
• Fast deployment: once the technique is mastered, the Razor system allows for lightning-fast blade opening
• Bold design: fully black silhouette and claw-shaped blade - a knife that doesn't go unnoticed
• Ambidextrous: the absence of a belt clip makes it suitable for both right- and left-handed users
• Emergency function: the glass breaker integrated into the handle adds a valuable safety dimension for everyday use

Use and Maintenance

The Panthera Black is a generously sized knife, ideal for users seeking a full grip and a powerful blade. Opening via the extended tang requires a short adjustment period, after which it becomes quick and instinctive. To preserve the performance of the Böhler N690 steel, clean the blade after use, dry it thoroughly, and regularly apply a thin coat of oil to the mechanism and edge. Periodic sharpening will ensure a lasting razor-sharp edge. Note: this model is supplied without a belt clip or sheath.