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The Böker Plus Extension Knife is possibly the weirdest knife I’ve ever seen. It’s like the guys who made G.I. Joes and Transformers in the 1980s made a full-size blade.
Designed by Hein, it appears to be a chunky, belt knife with a full tang 4.7″ clip point profile. What sets it apart is the extendable blade design. Press a button, and the handle flips end for end, doubling the exposed blade length. It’s more than meets the eye.
Now it’s a kukuri-ish profile blade, 7.3″ long, and ready for all kinds of bushcraft work. It’s made with D2 steel that is reasonably tough and edge-retaining.
It’s long enough for chopping and splitting kindling, but folds away to fit in the short sheath. Böker reports that it’s inspired by medieval Baselard swords, and the handle does seem to have a hilt.
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This blade is wacky, but it’s certainly not kitchy. It locks up tight and seems well-made.
The Takeaway
Who’s the Böker Plus Extension Knife for? Maybe for actual bushcraft use.
The short mode is a decent shape for processing carcasses, while the extended mode could help you win a reality TV show. If you’re into knives, this one deserves a look. It’ll be available in May, 2026 for $259.
Specs
- Brand: Böker Plus
- Type: Fixed Blade Knives
- Overall Length:11.81 in
- Blade Length:7.28 in
- Blade Thickness:0.20 in
- Weight:15.55 oz
- Blade Material: D2
- Handle Material: G10
- Made in:Asia
- Sheath Material: Kydex
- Available: May, 2026
- MSRP: $259
Learn more HERE.
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Levi is an avid hunter, and an increasingly avid shooter. He strives to make delicious and simple recipes from the game he kills. He makes a living as a professional photographer and writer. Check out his work.