- Kwaiken OTF Black, OTF (Out The Front) spring-loaded knife, blade extends forward from the handle. Strong construction, reliable operation is just a few of the advantages of this knife. Design by American knifemaker Lucas Burnley.

This product is intended for use only by adults with knowledge and experience in handling sharp cutting tools. Improper use of the knife can result in serious injuries. The blade is extremely sharp and can easily cut through skin and tissue; therefore, extra caution should always be exercised while cutting, and hands should be kept away from the cutting edge. To prevent the knife from slipping, it is recommended to cut on a stable, non-slip surface and avoid excessive force, which may cause uncontrolled blade movement.
Leaving the knife on the edge of a table, countertop, or in easily accessible places—especially where children are present—poses a significant safety risk. The knife should always be properly secured after use, ideally by placing it on a stable surface or storing it in designated knife blocks, protective sheaths, or magnetic strips. The knife should never be used for tasks it is not designed for, such as opening cans or prying objects, as this can damage the tool and lead to dangerous accidents.
A dull blade increases the risk of injury, as it requires more force and is more likely to slip from the material being cut. Therefore, it is essential to sharpen the knife regularly to maintain optimal sharpness. Additionally, proper cleaning and drying of the knife are necessary to prevent corrosion and bacterial growth. Periodic inspection of the handle and blade is recommended to check for cracks, chips, or looseness. If any damage is detected, the knife should be repaired or replaced immediately.
When using the knife, focus solely on the task at hand—avoid talking on the phone, watching television, or other distractions while cutting. Ensure proper lighting in the workspace for better visibility and control. Please note that some countries or regions have laws restricting the ownership and carrying of knives. Before purchasing or using this knife, verify that its use is legal in your location according to applicable regulations.
Following these safety guidelines will help ensure safe and effective knife use, minimizing the risk of accidents and extending the lifespan of the tool.
Böker Plus Kwaiken OTF Black, an automatic OTF (Out The Front) knife with a front extension head thanks to a strong spring. It works in D/A (Double Action) mode which means you can slide the blade in and out. Designed by renowned American knifemaker Lucas Burnley, whose designs combine clean, modern lines with tactical roots - a style Lucas describes as post-tactical.
The designer paid special attention to the design of the spring, opening the blade is done in a few hundredths of a second. When opening / closing the blade, the automatic makes a characteristic sound (click). In this model, the moment of force during unfolding/folding of the blade pleasantly jerks the hand, which shows what power is hidden in the springs of Böker Plus knives.
D2 - high carbon tool steel. With a high content of 10-13% chromium, it offers greater corrosion resistance than most high-carbon steels. Combines strength, excellent edge retention and easy sharpening. It is characterized by high hardness in the range of 59-61 HRC and resistance to abrasion.
Blade - Straight Back type finished with Stonewash method. Plain blade with high Flat Grind for excellent cutting properties. Mechanism of extending / retracting the blade by means of a moled slider requiring for safety reasons to apply a specific force to overcome the spring resistance. The way of opening ensures trouble-free opening for both right- and left-handed people.
Handle - made of aluminum alloy coated in black. Thanks to the texture of the coating the knife does not slip in your hand during use. Slim design allows you to hide the knife in any pocket. One-position clip (right side), allows you to carry the knife in tip-down position.
Böker Plus - the most advanced series of knives in the Böker offer. Well-known names in the knife industry were invited to collaborate on the design. In the offer you will find knives with a fixed head, folding knives, automatic knives and a wide range of accessories needed by a knife lover. Modern materials, German quality, all this makes the knives of the Böker Plus series trusted by customers.
Technical data:
Product number: 06EX551
Product name: Kwaiken OTF Black
Overall length: 208.0 mm / 8.19"
Blade length: 81.0 mm / 3.19"
Handle length: 127.0 mm / 5.0"
Blade thickness: 2.7 mm / 0.106"
Weight: 98.0 g / 3.4 oz
Blade material: D2
Blade grind: Flat
Blade finish: Stonewash
Handle material: Aluminum with coating
Handle finish color: Black
Clip: Right, Tip-Down
Clip material: Stainless Steel
Designer: Lucas Burnley
Brand name: Boker Plus
Manufacturer: Böker, Germany
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