6-Piece HSS M35 Cobalt Drill Bit Set – 1mm–6mm Metal Drilling

6-Piece HSS M35 Cobalt Drill Bit Set – Built for Tough Metals

Tackle your most demanding drilling jobs with this professional-grade 6-piece HSS M35 Cobalt Drill Bit Set. Engineered with 5% cobalt alloy (M35), these bits are designed to cut cleanly through stainless steel, hardened steel, iron, aluminum, and other tough metal materials — outperforming standard HSS bits every time.

Whether you're working in a workshop or on the job site, this set delivers consistent, reliable results across a full range of common sizes: 1mm, 2mm, 3mm, 4mm, 5mm, and 6mm.

Why Choose HSS-Co M35 Cobalt Drill Bits?

• Superior Heat Resistance: The 5% cobalt content significantly improves thermal tolerance, letting the bit stay sharp and effective even during extended or high-speed drilling sessions.
• 135° Split Point Tip: Self-centering tip starts drilling on contact — no center punch required — delivering precise, clean entry holes with minimal walking.
• Versatile Compatibility: Works with handheld drills and stationary drill presses for maximum flexibility across projects.
• Round Shank Design: Secure, wobble-free grip in standard and keyless chucks.
• Wide Material Range: Ideal for stainless steel, steel, iron, aluminum, and other metal alloys.
• 6-Piece Set: Includes sizes 1mm, 2mm, 3mm, 4mm, 5mm, and 6mm — a practical everyday range for most metalworking tasks.

Specifications

Package Contents

• 6 × HSS M35 Cobalt Drill Bits (1mm, 2mm, 3mm, 4mm, 5mm, 6mm)

Please Note

• Colors may appear slightly different due to monitor settings and ambient lighting.
• Please allow for minor measurement tolerances of ±0.1mm.

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For best practices when working with metal drilling tools, visit the OSHA Drill Press Safety Guidelines to ensure safe operation in your workspace.

Learn more: Drill bit

Frequently Asked Questions

Q: What metals can these HSS M35 cobalt drill bits cut through?

A: These M35 cobalt drill bits are designed for drilling through a wide range of metals including stainless steel, hardened steel, iron, aluminum, and other metal alloys. The 5% cobalt content makes them especially effective on high-tensile and hard metals where standard HSS bits may struggle.

Q: What is the advantage of the 135° split point tip?

A: The 135° split point tip is self-centering, meaning it grips the material on contact and begins drilling immediately without drifting or wandering. This results in more accurate, cleaner holes and reduces the need for a center punch before drilling.

Q: Are these drill bits compatible with my standard drill?

A: Yes. The round shank design ensures compatibility with most standard keyed and keyless chucks found on handheld drills and stationary drill presses, making them a versatile addition to any tool kit.

Q: How does cobalt content improve drill bit performance?

A: Cobalt (at 5% in M35 grade) is alloyed into the steel matrix, significantly increasing the bit's hardness and heat resistance at elevated temperatures. This allows the bit to maintain its cutting edge longer during demanding metalworking tasks, outlasting standard HSS bits in tough applications.