Drill Bit set GRAPHITE Hex shank for metal 4.0 mm, 2 pcs

Set of two GRAPHITE metal drill bits with 4.0 mm diameter and hex shank designed for drilling metal. These precision-cut bits are intended for through-holes, light fabrication and maintenance work and are compatible with hand drills, cordless drivers and quick-change bit holders that accept hex shanks. The compact two-piece set provides a straightforward solution for common metal drilling tasks where a durable 4.0 mm hole is required.

Advantages

The hex shank ensures secure grip in hex chucks and quick-change holders, reducing slippage during use. High-precision cutting geometry provides consistent hole size and clean chips when used on thin to medium-thickness metals. Supplied as a matched pair, the set offers a spare bit for continuous work or different positions without immediate re-sharpening. The compact format is easy to store and carry in a toolbox.

Suitable for

• Drilling through thin sheet metal and light plate
• Maintenance and repair tasks on metal components
• Light fabrication, brackets and fitting holes
• Use with hand drills, cordless drivers and quick-change chucks accepting hex shanks

Key specifications

• Diameter: 4.0 mm
• Shank type: Hex (hexagonal) shank for secure quick-change fit
• Material application: Designed for drilling metal
• Quantity: 2 pieces per set
• Cutting geometry: precision-cut flutes for clean chip evacuation

How to use

Install the hex shank securely in a compatible hex chuck or quick-change holder. Select an appropriate rotational speed for the metal type and thickness, apply steady pressure, and allow the bit to cut without forcing. Use cutting fluid or lubricant on thicker or harder metals to improve cutting performance and extend bit life. Retract periodically to clear chips and prevent clogging.

Usage recommendations

For best results, start with a pilot or center punch to position the hole accurately on sheet metal. Use moderate speed and light to medium feed pressure on thin materials; increase lubrication and reduce speed for harder or thicker metals. Replace or re-sharpen bits when wear causes oversized holes or poor chip formation.