Drill bit set GRAPHITE Hex 4.2 mm for metal, 2 pcs

Set of two GRAPHITE Hex 4.2 mm drill bits designed specifically for drilling metal. Each bit has a 4.2 mm working diameter and a hex shank that ensures secure grip in chucks, quick-change holders and cordless drivers. These bits are intended for creating clean, consistent holes in metal sheets, profiles and components used in repair, fabrication and installation work.

Advantages

The hex shank provides stable coupling with modern tool holders and reduces slippage under load. The 4.2 mm diameter is suitable for many common metal fasteners and pilot hole requirements. Supplied as a matched pair, the set offers a backup or the option to keep one bit in the machine while the other is stored, reducing downtime during repetitive tasks. Designed for metal use, the geometry of the cutting edges supports controlled chip formation and longer service life compared with general-purpose bits when used appropriately.

Suitable for

• Drilling holes in thin to medium-thickness metal sheets
• Pilot holes for screws, rivets or bolts in metal assemblies
• Maintenance and repair tasks on metal equipment and enclosures
• Light fabrication and installation work involving steel, aluminum or other common metals

Key specifications

• Quantity: 2 pieces
• Working diameter: 4.2 mm
• Shank type: hex shank for secure grip and quick-change compatibility
• Intended material: metal (sheets, profiles, components)

How to use

Select the appropriate drilling speed and feed for the specific metal type and thickness. Secure the workpiece to prevent movement, clamp or support thin sheets to avoid vibration, and fit the hex shank into a compatible chuck or quick-change holder. Apply steady, moderate pressure and allow the bit to cut without forcing; retract occasionally to clear chips if drilling deeper holes. Use cutting fluid or lubricant when working with steel or stainless steel to reduce heat and extend bit life.

Usage recommendations

For best results, start with a lower speed when drilling harder metals and increase speed for softer materials like aluminum. Inspect bits regularly for wear and replace when cutting edges become dull or damaged. Store the set in a dry place and avoid using the bits for masonry, wood or other non-metal applications to preserve cutting geometry and performance.