Dulotec K257-BK Folding Knife – G10 handle and D2 tool steel blade

17,99 €

A folding knife that’s the perfect size for everyday use
Blade made of D2 tool steel hardened to 60 HRC—strong and wear-resistant
Comfortable G10 polymer handle
Belt clip—deep for comfortable and easy carrying
Lightweight: 100 grams
Lock type: Liner lock
Warranty: 24 months

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Folding knife with D2 steel and a G10 handle

The Dulotec K257-BK is a lightweight and compact folding knife designed for everyday use. Its size is well-balanced—small enough to carry easily, yet large enough for most tasks.

The blade and metal components feature a black anti-glare coating. The knife has a lanyard hole and a reversible clip for deep-carry on a belt.

Knife Specifications

Specifications	Value
Brand	Dulotec
Model	K257-BK
Type	Folding knife
Steel on the blade	D2 tool steel
Hardness	60 HRC
Blade Length	85 mm
Blade Thickness	3.5 mm
Total length	198 mm
Handle Material	G10
Locking mechanism	Liner lock
Weight	100 g

Advantages of the flipper mechanism

One-handed opening
Quick and smooth opening
A streamlined profile for better performance
Convenience when changing the grip

D2 tool steel

D2 steel is characterized by high wear resistance, due to the combination of chromium, carbon, vanadium, and manganese in its composition. It is hardened to 60–61 HRC, making it an excellent choice for abrasive cutting.

G10 handle

G10 is a composite material made of fiberglass and resin—strong, wear-resistant, and very flexible. The grooved surface provides a secure grip and prevents slipping.

Bearings and Locking Mechanism

The built-in bearings are made of high-quality hardened steel and hard phosphor bronze. They ensure smooth opening and proper centering of the blade.

The liner lock is one of the most common locking mechanisms used in folding knives. A spring on the inside of the handle secures the blade in the open position. The blade is released with the thumb without changing your grip—which is practical for one-handed use.

Flipper Opening

The knife opens via a flipper—a tab on the spine of the blade with a grooved surface for better grip. It opens with a sliding motion of the index finger—quickly and intuitively.

About the Dulotec Brand

Dulotec develops tools that offer an optimal balance between price and quality. The focus is on proven materials, precise heat treatment, and assembly—without unnecessary features that drive up the cost of the product without providing any real added value.

Frequently Asked Questions

What kind of steel is the blade of the Dulotec K257-BK made of?

The blade is made of D2 tool steel, hardened to 60 HRC. D2 is known for its excellent wear resistance thanks to its chromium, carbon, vanadium, and manganese content. It ensures a long-lasting edge and is suitable for intensive daily use. Maintaining and sharpening D2 steel is relatively easy when done with the proper technique.

What is the handle made of, and why was that material chosen?

The handle is made of G10—a composite of fiberglass and resin. The material is extremely strong, wear-resistant, and very flexible. The textured surface prevents slipping even with wet hands. G10 ranks among the most durable materials used in everyday-use knives.

How does the liner lock mechanism work on the K257-BK?

The liner lock uses a side spring on the inside of the handle. When the blade is fully extended, the spring slides inward and locks it securely in place. To close the knife, press the spring to the side with your thumb, which releases the blade. The entire process can be performed with one hand without changing your grip—convenient for tasks that require both hands.

What is a flipper opening mechanism, and how is it used on this knife?

The flipper opens via a small tab protruding from the spine of the blade. The surface of the tab is grooved for better grip. The blade is opened with a sliding motion of the index finger—quick, intuitive, and convenient. The flipper mechanism is preferred for everyday use because of its speed and ease of opening.

What are the dimensions and weight of the Dulotec K257-BK?

The blade is 85 mm long and 3.5 mm thick. The total length of the knife when open is 198 mm. It weighs 100 grams. These dimensions make it compact enough to carry, yet functional enough for everyday tasks.

How can the knife be carried?

The K257-BK features a reversible belt clip that allows for a deep carry—the blade remains hidden beneath the edge of the pocket. The clip is reversible, meaning it can be mounted on the left or right side, depending on your preference. Additionally, there is a lanyard hole for an alternative attachment method.

Why are the blade and the metal parts coated in black?

The black coating on the blade and other metal parts reduces glare when working outdoors or in bright light. In addition to its practical function, the coating gives the knife a sleek look. The liners are made of stainless steel, which contributes to the durability of the entire tool.