Kubey KB Socius Knife Black DLC Titanium, Black DLC CPM S90V by Jonathan Jacobs (KB300C)
- Socius Black DLC Titanium, a premium-class Black DLC EDC folding knife designed by Jonathan Jacobs. The blade is made of premium CPM S90V steel, featuring a comfortable titanium handle with a triangular pattern and a secure Frame Lock.
203,17 €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.
KB Socius Black DLC Titanium, Black DLC CPM S90V by Jonathan Jacobs (KB300C) is a premium EDC folder featuring a Tanto Point blade, CPM S90V steel, and a Frame Lock mechanism.
KB Socius – a tactical EDC folding knife designed by Jonathan Jacobs
KB Socius Black DLC Titanium, Black DLC CPM S90V by Jonathan Jacobs (KB300C) combines the aggressive geometry of the Tanto Point blade with a titanium handle coated in Black DLC and finished with Triangle Milling. Jonathan Jacobs’ design has a distinctly technical character: a slim profile, a strong tip, a Frame Lock and ceramic ball bearings create a folder designed for everyday carry, tactical applications, and precision work with utility materials.
The blade is made of CPM S90V powder-coated steel, which has undergone vacuum heat treatment and a cryogenic process. A hardness of 60–62 HRC ensures long-lasting sharpness, while the flat grind provides predictable blade guidance through cardboard, cord, packaging, and plastics. The Black DLC coating enhances the knife’s technical appearance and increases the surface’s abrasion resistance. Opening via the thumb hole allows for controlled, one-handed operation.
CPM S90V Tanto Point blade
The Tanto Point profile features a strong tip and a distinct break in the cutting edge, which facilitates precise scoring, tip work, and tasks requiring decisive blade guidance. The flat grind reduces resistance during cutting and ensures good control over the blade in everyday use. The Black DLC finish gives the surface a uniform, matte appearance and emphasizes the model’s tactical and utilitarian character.
CPM S90V is a premium powder-metallurgy steel, valued for its very high abrasion resistance and exceptionally long edge retention. It requires more patient sharpening than more popular EDC steels, but performs well where edge stability is important during regular use. Vacuum treatment and cryogenic annealing ensure consistent material properties at a hardness of 60–62 HRC.
Black DLC Titanium Handle and Frame Lock
The handle, made of Titanium, ensures high rigidity, mechanical resistance, and a favorable strength-to-weight ratio. The Black DLC / Triangle Milling finish combines a protective coating with geometric milling, which enhances the visual rhythm of the design and supports a more secure grip on the knife. The titanium backspacer, clip, and hardware maintain a consistent black finish.
The Frame Lock uses a spring-loaded section of the titanium handle to stabilize the blade when open. Ceramic ball bearings ensure smooth pivot operation, and the thumb hole allows for controlled manual opening. The right-side, tip-up titanium clip allows for comfortable carrying in a right-hand pocket, while the included Pouch protects the folder during transport and storage.
Key Features at a Glance
- Blade: CPM S90V steel with a hardness of 60–62 HRC, Tanto Point profile, flat grind, and Black DLC coating.
- Handle: titanium with black DLC coating and Triangle Milling.
- Mechanics: ceramic ball bearings, thumb hole, and Frame Lock.
- Carrying: right-side titanium clip, tip-up, and protective Pouch case.
- Application: premium EDC, tactical tasks, and daily work with utility materials.
Technical Specifications
| Product Number | KB300C |
| Product Name | KB Socius Black DLC Titanium, Black DLC CPM S90V by Jonathan Jacobs |
| Overall length | 205.00 mm / 8.07" |
| Blade length | 88.00 mm / 3.46“ |
| Blade Thickness | 3.10 mm / 0.12” |
| Handle Length | 117.00 mm / 4.61“ |
| Handle thickness | 12.00 mm / 0.47” |
| Weight | 105.00 g / 3.71 oz |
| Blade material | CPM S90V |
| Blade hardness | 60–62 HRC |
| Blade profile | Tanto Point |
| Blade grind | Flat |
| Blade finish | Black DLC |
| Handle Material | Titanium |
| Handle Finish Color | Black DLC / Triangle Milling |
| Backspacer Material | Titanium |
| Backspacer color | Black DLC |
| Clip | Right, Tip-Up |
| Clip material | Titanium |
| Pivot mechanism | Ceramic ball bearings |
| Lock | Frame Lock |
| Opening method | Manual, thumb hole |
| Additional accessories | Pouch |
| Designer | Jonathan Jacobs |
| Brand | KB Knives |
| Manufacturer | Kubey Knife |
| Country of origin | China |
Frequently Asked Questions
What is the KB Socius designed for?
The Socius works well as a premium EDC folder for cutting cardboard, packaging, cords, and plastics, as well as a tactical utility knife with a strong Tanto Point profile.
How does the Frame Lock work?
Frame Lock uses a spring-loaded part of the titanium handle to support the blade when open. The mechanism ensures high rigidity, simple operation, and a minimal number of moving parts.
How to care for CPM S90V steel and how to sharpen it?
After use, the blade should be cleaned, thoroughly dried, and periodically coated with a thin layer of oil. For sharpening CPM S90V, it is best to use diamond or CBN wheels, as the steel has very high wear resistance.
What sharpening angle does the manufacturer recommend?
The manufacturer specifies a range of 15°–20°. A lower angle improves cutting aggressiveness, while a value closer to 20° increases edge durability during heavier use.
How can the blade be opened?
The blade can be opened using the thumb hole. Ceramic ball bearings ensure smooth and consistent operation of the mechanism during manual use.
Developed by: Specialists at Sharg® – Your expert in EDC and cutting tools
