This year, the wait until Christmas turns into a real knife-making experience. Behind the 24 windows of the Böker Plus 2026 DTK Advent Calendar lie the various components needed to assemble a fully functional folding knife.

The 2026 edition is based on the Böker DTK – which stands for Duty Tactical Knife – a compact model designed with reliability and versatility in mind. Each new part offers a deeper insight into its construction, whilst keeping the surprise of the materials and customisation options selected by Böker a secret right up to the last moment.

Once assembled, the DTK features a 7.8 cm blade, a thumb-hole opening mechanism and a robust lockback mechanism. Its configuration can be adapted to allow for one-handed opening or, in a more traditional approach, two-handed opening.

Detailed instructions and a video tutorial guide you through the various stages of assembly. The project is therefore accessible to curious beginners whilst retaining enough technical interest to appeal to enthusiasts already familiar with the mechanics of folding knives.

Technical specifications for the Böker Plus Adventskalender 2026 DTK 01BP0095 folding knife:

Type: Advent calendar with assembly kit for a folding knife
Total length of the knife when closed: 11.1 cm
Blade length: 7.8 cm
Total length of the knife when open: 18.9 cm
Blade thickness: 3.0 mm
Blade steel: not disclosed by the manufacturer
Handle material: not disclosed by the manufacturer
Opening mechanism: manual, via thumb hole
Configuration: one-handed or two-handed opening
Lock type: Lockback
Assembled knife weight: 74 g
Manufactured in: Asia
Assembly instructions: detailed instructions and video tutorial
Manufacturer’s reference: 01BP0095

Tellknives review:
Much more than just seasonal packaging, this calendar offers a fun introduction to the mechanics of a folding knife. The experience isn’t limited to a daily discovery: it continues through the assembly, customisation and, ultimately, the use of a DTK that you’ve built yourself.

Böker deliberately keeps the materials and options behind the various windows a secret. We fully respect this decision, as revealing the contents of the box too early would take away much of its charm. An original and interactive gift idea, but also a particularly appealing project for any enthusiast keen to gain a better understanding of how their knife is constructed.