K25 RK-19221 Knife Rubbered Black Aluminium, Black Titanium 7Cr17Mov

The RK-19221 is a folding EDC tactical knife designed for users looking for a lightweight, reliable tool for everyday use in the field and in urban settings. The K25 brand design combines compact form with functionality, offering a blade made of 7Cr17MoV stainless steel, known for its corrosion resistance and ease of sharpening. The black titanium coating used reduces light reflections and increases abrasion resistance, giving the blade a tactical feel. Blade with drop point profile allows precise handling and efficient cutting of a variety of materials. The design is based on a liner lock mechanism , which provides a secure lock in the open position. Handle made of anodized aluminum with rubberized coating provides comfort and grip in all conditions - from moisture to working with gloves. The model is equipped with a belt clip, a cord hole and an attached nylon sheath , which allows for a variety of carrying options. The RK-19221 is a tool for those who appreciate durability, compactness and practical design with utility.

7Cr17MoV is a martensitic chromium steel, often referred to as an improved version of 440A steel. Its nominal chemical composition includes about 0.60-0.75% carbon (C) and 16.0-18.0% chromium (Cr), with additions of molybdenum (Mo) and vanadium (V) in smaller amounts. The higher chromium content provides very good corrosion resistance in typical environments. Carbon is responsible for hardness, which after appropriate heat treatment can reach about 56-58 HRC, which is sufficient for many applications. Molybdenum increases hardenability and improves resistance to pitting corrosion, while vanadium contributes to the formation of fine carbides, which increases abrasion resistance and allows the cutting edge to remain sharp longer. 7Cr17MoV steel is widely used in the mass production of kitchen knives, folding knives for everyday use (EDC), multi-tools and outdoor equipment, where a good combination of corrosion resistance, acceptable hardness and ease of sharpening is crucial .

Blade - drop point type , made of 7Cr17MoV stainless steel, provides good cutting properties and weather resistance. Thanks to black titanium coating, the blade gains increased scratch resistance and anti-reflective effect. The opening mechanism with a pin in the wedge allows the blade to be quickly unfolded with one hand, and the liner lock prevents accidental folding during use. The blade geometry has been optimized for versatile EDC tasks - from simple cuts to technical and emergency operations. The compact size and folding form make this model ideal for everyday carry.

The Handle is made of anodized aluminum and covered with a rubberized coating, ensuring a secure grip and comfort even in harsh environments. The gentle profiling supports ergonomics and control of the knife. The Handle is rugged and maintenance-free, making it extremely practical for tactical and outdoor applications. It comes with a black nylon sheath, which protects the knife during transport and offers an alternative form of carrying. All in all, it makes for a modern, rugged EDC tool in a compact format.

Technical data:

Product number: 19221
Product name: Rubbered Black Aluminum, Black Titanium

Overall length: 200.0 mm / 7.87"
Blade length: 85.0 mm / 3.35"
Blade thickness: 3.0 mm / 0.12"
Handle length: 115.0 mm / 4.53"
Handle thickness: n.d.
Weight: 138.0 g / 4.87 oz

Blade material: 7Cr17MoV
Blade hardness: n.d.
Blade grind: Flat
Blade finish: Black titanium coated

Handle material: Rubbered Aluminum
Handle finish color: Black
Backspacer material: Stainless Steel
Backspacer Color: Black

Clip: none
Clip material: n.d.

Pivot mechanism: n.d.
Locking mechanism: Liner Lock
Opening method: Manual, thumb stud
Additional accessories: Nylon pouch

Designer: Martinez Albainox
Brand: K25
Manufacturer: Martinez Albainox S.L.U., Spain
Country of origin: n.d.

Developed by: the Sharg® company