BFK ZERO N690 GREEN Stone Washed

The Extrema Ratio BFK ZERO N690 GREEN Stone Washed is the compact version of the BFK series, designed for everyday carry and versatile daily work. Despite its reduced dimensions, the ZERO features the same Crossbar Lock mechanism as the full-size BFK.

Precisely milled handle scales, tight manufacturing tolerances and a carefully engineered construction provide a secure grip and solid handling. The blade is made from Böhler N690 steel, hardened to 58 HRC, and features a distinctive stonewashed finish.

Crossbar Lock

The Crossbar Lock secures the blade with a play-free lockup and allows comfortable one-handed operation. The mechanism can be operated from either side. During closing, the fingers remain clear of the blade's edge path, allowing the blade to be closed in a controlled manner.

Compact and Lightweight

With an overall length of 16.7 cm and a weight of just 76 g, the BFK ZERO is particularly compact and lightweight. The reversible pocket clip allows fully ambidextrous carry and keeps the knife discreetly positioned along the edge of the pocket.

Its compact proportions make it especially suitable for smaller pockets and spaces where a full-size folder would take up too much room.

GREEN – Carbon Fiber and Stonewashed

The GREEN version combines a carbon fiber handle with a stonewashed blade. The visible carbon fiber weave combines a lightweight construction with high rigidity and gives the knife a modern, technical appearance.

The blade's stonewashed finish complements the character of the carbon fiber handle and creates a distinctive contemporary look.

Product Features

• Böhler N690 blade steel
• Blade hardness: 58 HRC
• Stonewashed blade finish
• Flat grind
• Carbon fiber 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 and particularly lightweight format for everyday carry

Technical Specifications

• Overall length: 16.7 cm
• Blade length: 6.8 cm
• Blade thickness: 2.75 mm
• Weight: 76 g
• Blade steel: Böhler N690
• Hardness: 58 HRC
• Blade finish: Stonewashed
• Blade grind: Flat Grind
• Handle material: Carbon fiber
• Locking mechanism: Crossbar Lock