KB Knives Lynx Flame Titanium / Wave Carbon Fiber, Beadblasted M390 by Jonathan Jacobs (KB427B)

KB Knives Lynx Flame Titanium / Wave Carbon Fiber Folding Knife, Beadblasted M390 by Jonathan Jacobs (KB427B)

The KB Knives Lynx KB427B is a titanium folding knife designed by Jonathan Jacobs, combining a Böhler M390 steel blade with a Flamed-style handle and a decorative carbon fiber inlay featuring a Wave pattern. The Clip Point profile, Crossbar Lock, and pivot mounted on phosphor bronze washers create a design that is distinctly functional yet refined.

The 90.00 mm blade features a flat grind and a matte, bead-blasted finish. It opens manually using thumb studs on both sides, and once fully extended, the blade is secured by the Crossbar Lock.

Böhler M390 and Vacuum-Cryogenic Heat Treatment

The blade is made of Böhler M390 steel, hardened to 60–62 HRC. Vacuum hardening combined with cryogenic treatment was used, which helps achieve high hardness, wear resistance, and stable steel properties during regular use.

Clip Point, Flat Grind, and Bead Blasted

The Clip Point profile provides a slim, well-controlled tip and versatile edge geometry. The flat grind supports efficient cutting, while the bead-blasted finish gives the blade a matte, subdued appearance.

Flamed Titanium, Wave Carbon Fiber, and Crossbar Lock

The handle is made of titanium and finished in the decorative Flamed variant. Its surface is complemented by an carbon fiber inlay with a Wave pattern, which gives the design a more distinctive and multi-layered character. The titanium backspacer and clip maintain the consistent Flamed aesthetic.

Phosphor bronze washers handle the pivot mechanism, while Crossbar Lock stabilizes the blade when open. The clip is positioned on the right side in a tip-up configuration.

Key Features at a Glance

• Böhler M390 — steel with a hardness of 60–62 HRC.
• Vacuum-cryogenic treatment — enhances the steel’s high hardness, wear resistance, and stability.
• Clip Point — a profile with a precise, well-controlled tip.
• Flat Grind — a versatile cutting geometry.
• Bead Blasted — a matte finish on the blade.
• Flamed Titanium — decorative finish on the titanium handle.
• Wave Carbon Fiber — carbon fiber inlay with a distinctive pattern.
• Crossbar Lock — lock with a crossbar locking mechanism.
• Phosphor Bronze Washers — pivot mounted on phosphor bronze washers.
• Double-sided thumb studs — manual opening.

Technical data

Frequently Asked Questions

How do I care for Böhler M390 steel?

It’s a good idea to clean the blade regularly and dry it thoroughly. M390 has high corrosion resistance, but proper care helps maintain sharpness and the blade’s appearance for longer.

How do you sharpen the KB Lynx?

High-performance abrasives, especially diamond ones, work well with M390 steel. It’s best to maintain the factory edge geometry and guide the sharpener evenly along the entire length of the blade.

How does the Crossbar Lock work?

The Crossbar Lock uses a transverse locking bar that stabilizes the blade once it is open. Releasing the lock allows the knife to be folded.

How do you care for the carbon fiber inlay?

It’s best to use a soft, slightly damp cloth for cleaning. Avoid harsh chemicals and abrasive materials that could alter the appearance of the inlay’s surface.

How to maintain the pivot on phosphor bronze washers?

It is a good idea to regularly clean the area around the pivot to remove dust and fine dirt. If necessary, you can use a small amount of a cleaner designed for the pivot mechanism.

Prepared by: Specialists at Sharg® company – Your expert in EDC and cutting tools