BFK ZERO N690 AVIO Stone Washed

The Extrema Ratio BFK ZERO N690 AVIO Stone Washed is the compact version of the BFK series, designed for everyday carry and versatile daily work. Despite its compact 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.

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 and safe manner.

Compact Everyday Carry

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

Weighing just 77 g, the ZERO is especially well suited to users looking for a lightweight and space-efficient folding knife for everyday carry.

AVIO – G10 and Stonewashed

The AVIO version combines a G10 handle with a stonewashed blade. G10 does not absorb water and remains dimensionally stable under both high and low temperatures, helping the material retain its properties and surface characteristics over time.

Its discreet aviation-blue color gives the knife a technical appearance with an aeronautical character.

Product Features

• Böhler N690 blade steel
• Blade hardness: 58 HRC
• Stonewashed blade finish
• Flat grind
• G10 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 lightweight format for everyday carry

Technical Specifications

• Overall length: 16.7 cm
• Blade length: 6.8 cm
• Blade thickness: 2.75 mm
• Weight: 77 g
• Blade steel: Böhler N690
• Hardness: 58 HRC
• Blade finish: Stonewashed
• Blade grind: Flat Grind
• Handle material: G10
• Locking mechanism: Crossbar Lock