BFK ZERO N690 BLACK

The Extrema Ratio BFK ZERO N690 BLACK is the compact folder in the BFK series. Despite its reduced dimensions, the ZERO features the same proven Crossbar Lock mechanism as the full-size BFK. Precisely milled handle scales, tight manufacturing tolerances and a carefully engineered construction provide a solid and refined handling experience.

The blade is made from Böhler N690 steel, hardened to 58 HRC, and features a black MIL-C-13924 burnished finish. This proven steel combines hardness, resilience and reliable performance for everyday work.

Crossbar Lock

The Crossbar Lock secures the blade with a play-free lockup and allows comfortable one-handed operation. The mechanism is fully ambidextrous, while the closing movement keeps the fingers clear of the blade's edge path for controlled and intuitive operation.

Compact and Practical

With an overall length of 16.7 cm, the BFK ZERO is considerably more compact than the full-size BFK. This makes it particularly discreet and convenient to carry in a trouser pocket or other smaller pockets where a full-size folder may feel too bulky.

The reversible pocket clip allows fully ambidextrous carry and keeps the knife discreetly positioned along the edge of the pocket. Weighing just 85.5 g, the ZERO remains lightweight and unobtrusive throughout the day.

BLACK – Minimalist and Technical

The BLACK version combines an Anticorodal anodized aluminum handle with a black burnished blade. The precisely milled handle scales provide a secure grip while giving the knife its distinctive technical appearance.

Product Features

• Böhler N690 blade steel
• Blade hardness: 58 HRC
• MIL-C-13924 burnished blade finish
• Flat grind
• Anticorodal anodized aluminum handle scales
• Crossbar Lock
• Play-free blade lockup
• One-handed operation
• Ambidextrous lock operation
• Reversible pocket clip
• Fully ambidextrous carry
• Precisely milled handle scales
• Secure grip with dry or wet hands
• Compact format for everyday carry

Technical Specifications

• Overall length: 16.7 cm
• Blade length: 6.8 cm
• Blade thickness: 2.75 mm
• Weight: 85.5 g
• Blade steel: Böhler N690
• Hardness: 58 HRC
• Blade finish: MIL-C-13924 Burnishing
• Blade grind: Flat Grind
• Handle material: Anticorodal anodized aluminum
• Locking mechanism: Crossbar Lock