6pc Cobalt Spiral Drill Bit Set (3-8mm)

Reliable Cobalt Drill Bit Set for Demanding Jobs

This 6-piece cobalt drill bit set is engineered for consistent performance in tough materials. Manufactured from high-grade cobalt alloy, each bit offers enhanced heat resistance and wear resistance, helping maintain sharp cutting edges over extended use.

The spiral flute design supports smooth drilling by drawing chips away from the cutting edge, reducing friction and heat build-up. Metric diameters of 3, 4, 5, 6, 6.5 and 8 mm cover a wide range of common drilling tasks, from pilot holes to larger fixings. Suitable for use on wood, mild steel, stainless steel, non‑ferrous metals, plastics and composite materials, these bits integrate easily into both professional and workshop toolkits.

Why It's a Smart Choice

• Durable cobalt construction - Cobalt alloy provides increased hardness and heat resistance, helping the cutting edge stay sharp when working in metal and other demanding substrates.
• Efficient spiral flute design - Spiral flutes support rapid chip evacuation for smoother drilling, less binding and reduced strain on your drill.
• Versatile size range - Six metric sizes (3-8 mm) cover frequent fastening and fabrication requirements in woodworking, metalworking and general construction.

The set is supplied in a compact, protective case that keeps each bit organized and helps prevent damage during storage and transport. Compatible with most corded and cordless drills with standard chucks, these bits are straightforward to install and change, supporting efficient workflow on site or in the workshop.

FAQ

Q: Which materials can these bits drill?
A: They are suitable for wood, mild steel, stainless steel, non‑ferrous metals, plastics and many composite materials, provided correct speed and lubrication are used for metals.

Q: What are the exact sizes included?
A: The set includes 3 mm, 4 mm, 5 mm, 6 mm, 6.5 mm and 8 mm drill bits.

Q: Can I use these bits with a cordless drill?
A: Yes. They fit standard drill chucks and can be used with both corded and cordless drills.

Q: Do these bits require cutting fluid?
A: For metal, using cutting oil or lubricant is recommended to extend tool life and improve drilling performance.