- Cavy Yellow Ultem, Stonewashed, full tang, pushdagger, designed by MUZI Design. Blade made of Sandvik 14C28N stainless steel, handle made of ULTEM composite. Kydex sheath, simple clip for attaching to belt.

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.
Cavy Yellow Ultem, Stonewashed, push dagger designed by the renowned MUZI Design studio, a perfect example of precision craftsmanship and functionality. The full tang construction provides exceptional durability, making it a reliable tool in a variety of situations. The blade is made of Sandvik 14C28N stainless steel, which is characterized by excellent corrosion resistance and long-lasting sharpness. The handle made of Ultem™ composite offers a secure and comfortable grip, even in difficult conditions. The textured surface provides additional control during use. The Kydex sheath is designed for practicality, and the simple clip allows for easy attachment to a belt or pocket edge, ensuring quick access to the knife. The whole combines elegant design with reliable functionality, meeting the expectations of even the most demanding users.
A push dagger, also known as a punch dagger, punch knife, push knife or, less commonly, push dirk, is a knife with a short blade and a T-shaped handle positioned at right angles to the blade. It is designed to be gripped and held in a closed fist so that the blade protrudes from the front of the fist, between the index and middle fingers or between the two middle fingers when the handle and blade are symmetrical.
Kubey - an independent brand and one of the largest manufacturers producing excellent quality knives at a great price! The company's motto is “An Edge Above the Rest”. Thanks to the use of high-speed CNC machine tools, milling machines, laser cutting and custom manual finishing, the brand focuses on high-quality workmanship and an innovative approach to design. Kubey is legendary for the durability and functionality of its knife tools, which will last for years!
14C28N - martensitic stainless chromium steel is the latest development in the range of knife steels produced by the Swedish steelworks Sandvik. The optimized chemical composition with a unique combination ensures the highest quality, excellent edge performance, high hardness and corrosion resistance. By reducing the carbon content to 0.62% (C) and increasing the chromium content to 14.0% (Cr), as well as adding nitrogen to 0.11% (N), the corrosion resistance has been significantly increased. Considered an improved version of 13C26. Unbeatable in terms of price/quality!
Vacuum & Cryogenic - 14C28N steel undergoes a specialized heat treatment process involving two key stages. Vacuum Heat Treatment - the steel is hardened in a vacuum environment, which minimizes oxidation and ensures more uniform metal properties. This process increases the strength and structural integrity of the steel. Cryogenic Treatment After heating, the steel is rapidly cooled to extremely low temperatures, often below -100°C (-148°F). This transformation changes the residual austenite into martensite, significantly increasing the hardness, wear resistance and overall durability. Thanks to these advanced processes, 14C28N steel ensures exceptional performance, offering both razor-sharp edge retention and extraordinary blade durability.
Blade - Spear Point Double Edge, sharpened on both sides. Finished with a Stonewashed coating to hide fine scratches caused by use. Both cutting edges with a slightly marked belly converge towards the sharp tip of the blade. The thickness of the blade and the centrally placed grain ensure high durability, while the full flat grind provides excellent cutting edge geometry and extreme cutting performance. The finger ring additionally stabilizes the handle and prevents the knife from accidentally falling out of the hand.
ULTEM™ - a material belonging to the polyetherimide family, or simply PEI. This material is characterized primarily by high mechanical and impact strength with a very high strength-to-weight ratio. It is also characterized by high thermal resistance (180⁰C) and high chemical resistance to all kinds of solvents (synthetic and natural), greases and other chemicals. Add to this its complete insensitivity to weather conditions, and you get the perfect material for knife handles.
Handle - grips made of transparent Ultem™, a virtually indestructible material that is insensitive to weather conditions, resistant to chemicals and mechanical damage, textured to improve grip. The contoured shape ensures a comfortable, secure grip even with wet hands. The finger cut-out at the front and the thumb ramp improve the grip.
Sheath - made of kydex, extendable, protects the blade. Thanks to the clip attached to it, the knife can be attached to a belt or equipment in almost any way.
Technical data:
Product number: KU403F
Product name: Cavy Yellow Ultem, Stonewashed
Overall length: 109.0 mm / 4.29”
Blade length: 58 mm / 2.28”
Blade thickness: 4.0 mm / 0.16”
Handle length: 51.0 mm / 2.01”
Handle thickness: 12.0 mm / 0.47”
Weight: 123.0 g / 4.34 oz
Blade material: Sandvik 14C28N
Blade hardness: 60-62 HRC
Blade grinding: Flat
Blade finishing: Stonewashed
Handle material: Ultem™
Handle finish color: Yellow
Sheath (holster): Kydex
Accessories: clip
Designer: MUZI Design
Brand: Kubey Knife
Manufacturer: Kubey Knife
Country of origin: P.R.C.
Development: Sharg® company