19pc M35 Cobalt Drill Bit Set 1–10mm | Stainless Steel & Hard Metal

19-Piece M35 Cobalt Metric Drill Bit Set – 1mm to 10mm

Tackle the toughest drilling jobs with confidence. This professional-grade M35 Cobalt Steel drill bit set delivers outstanding performance on stainless steel, cast iron, hardened metal, and other demanding materials. Whether you're a seasoned tradesperson or a serious DIY enthusiast, these high-cobalt bits offer the durability and precision you need to get the job done right.

Key Features

• M35 High-Cobalt Steel Alloy: Contains 5% cobalt for superior heat resistance and extended cutting life compared to standard HSS bits.
• Full Metric Range: Includes 19 drill bits covering 1mm through 10mm in 0.5mm increments — a versatile set for a wide variety of applications.
• Round Straight Shank: Compatible with standard 3-jaw drill chucks; secure grip prevents slipping during heavy-duty use.
• 135° Split Point Tip: Self-centering geometry starts drilling on contact, reducing walking and improving hole accuracy without a centre punch.
• Precision Ground Flutes: Optimised spiral flutes ensure fast, efficient chip evacuation for cleaner holes and cooler cutting temperatures.
• Wide Material Compatibility: Suitable for stainless steel, hard metal, cast iron, aluminium, copper, wood, and plastics.
• Organised Storage Case: Each bit sits in a labelled slot for quick size identification and safe storage.

Specifications

What's in the Box?

• 19 × M35 Cobalt Metric Drill Bits (1mm, 1.5mm, 2mm, 2.5mm, 3mm, 3.5mm, 4mm, 4.5mm, 5mm, 5.5mm, 6mm, 6.5mm, 7mm, 7.5mm, 8mm, 8.5mm, 9mm, 9.5mm, 10mm)
• 1 × Labelled Storage Case

Perfect For

• Metal fabrication & engineering workshops
• Plumbing installations on stainless steel fixtures
• Automotive bodywork & mechanical repairs
• Home improvement projects involving hard materials
• Woodworking & general DIY tasks

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Frequently Asked Questions

Q: What materials can the M35 Cobalt drill bits cut through?

A: These M35 cobalt drill bits are designed for hard and demanding materials including stainless steel, cast iron, hardened metal, aluminium, copper, brass, wood, and plastics. The 5% cobalt content gives them significantly better heat resistance than standard HSS bits, making them ideal for stainless steel and hard metal drilling.

Q: What drill speed should I use with cobalt drill bits on stainless steel?

A: When drilling stainless steel, use a slower RPM (generally 300–600 RPM for 4mm–8mm bits) with steady, consistent pressure and cutting oil or lubricant to reduce heat build-up. Smaller diameter bits (1mm–3mm) can tolerate slightly higher speeds. Avoiding excessive heat is key to maximising the life of your cobalt bits.

Q: Are these bits compatible with a standard cordless drill?

A: Yes. The round straight shank is compatible with any standard 3-jaw keyless or keyed chuck found on corded and cordless drills. For best results when drilling hard metals, a corded drill or a high-torque cordless drill is recommended to maintain consistent cutting speed.

Q: Do the bits come in a storage case?

A: Yes! The set includes a clearly labelled storage case with individual slots for each of the 19 drill bits, making it easy to find the right size quickly and keep your bits organised and protected from damage.

Production & Packaging Notice

To maintain high stock availability and fast shipping times, our items are sourced from multiple verified manufacturing facilities. While the core quality, materials, and product specifications remain identical, you may notice slight variations in the packaging design, manufacturing origin, or the wording of the printed instructions.