Mechanical graphite leads Koh I Nor Grafit Kubuś 5.6 mm 4B pack of 6

Koh I Nor Grafit Kubuś mechanical graphite leads are 5.6 mm diameter refill sticks in 4B hardness, supplied as a pack of six. These leads are formulated to produce soft, dark strokes suitable for freehand drawing, sketching and technical marking. They fit mechanical holders and clutch-style pencils that accept 5.6 mm leads and are intended for users who require pronounced graphite lines with good blendability and shading control.

Advantages

The 4B hardness delivers dark, high-contrast lines while remaining soft enough for smooth application and easy blending. The 5.6 mm diameter provides a robust core for broader strokes and reduces breakage in holders designed for thicker leads. Packaged in a set of six sticks, the product offers straightforward refilling and consistent performance across multiple drawing sessions.

Suitable for

• Sketching and tonal studies
• Freehand drawing and illustration
• Technical marking and layout work requiring bold lines
• Art education and classroom use
• Shading and blending techniques

Key specifications

• Diameter: 5.6 mm
• Hardness: 4B (soft, dark graphite)
• Quantity: 6 refill sticks per pack
• Compatibility: mechanical and clutch-style holders that accept 5.6 mm leads
• Intended use: drawing, sketching, marking, shading

How to use

Insert a single 5.6 mm lead stick into a compatible mechanical or clutch-style pencil according to the pencil manufacturer's instructions. Apply pressure appropriate to the medium and paper: lighter pressure for fine shading and heavier pressure for darker, thicker lines. Replace the lead when the tip becomes too blunt or worn to maintain consistent line quality. Use a kneaded or rubber eraser to lift graphite where lightening is needed, and a blending stump or tortillon to refine gradients.

Usage recommendations

Store the leads in a dry place and avoid extreme mechanical shocks to reduce the risk of breakage. For best results on textured papers, test strokes on a scrap area to judge pressure and blending behavior. Select 4B leads when strong, expressive graphite marks are required; consider harder grades for fine detail work.