M35 Cobalt HSS Twist Drill Bits Set – Metal & Stainless Steel

RveTee M35 Cobalt HSS Twist Drill Bits Set – Drill Through Anything

Take on the toughest materials with confidence. The RveTee M35 Cobalt High-Speed Steel Twist Drill Bits Set is engineered for professionals and serious DIYers who need reliable, heat-resistant bits that power through stainless steel, iron, copper, aluminum, and wood without dulling, chipping, or slipping. Available in 5, 6, 8, 13, and 19-piece kits — there's a set for every job.

Made in Mainland China.

Why Choose M35 Cobalt HSS Drill Bits?

• ⚙️ Super-Hard M35 Cobalt Construction — Premium M35 cobalt high-speed steel (HSS 6542 / 4241) delivers outstanding heat resistance and hardness. These bits stay sharp longer and won't burn out when drilling through dense metals like stainless steel or thick iron plates.
• 💡 Precision-Ground Spiral Flutes — Sharp, finely-ground flutes evacuate chips rapidly, preventing clogging and delivering clean, burr-free holes with minimal effort — even for first-time users.
• 🛠️ Multiple Set Options — Choose from 5/6/8/13/19-piece kits covering bit sizes from 1mm to 10mm, giving you the right size for pilot holes, standard openings, and everything in between.
• 🔌 Universal Straight Shank — Standard straight shanks fit virtually all corded and cordless drills with no adapters needed. Grab them and get to work immediately.
• 📦 Organized Storage Case — Every set comes in a sturdy red case with individual slots for each bit size, so you'll never lose a drill bit or waste time searching through a toolbox.

Specifications

Perfect For

• Home repairs and renovations
• Auto and motorcycle maintenance
• Metalworking and fabrication
• Woodworking and carpentry
• Workshop and DIY projects

Complete Your Toolkit

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For safe power tool practices and drill bit usage tips, refer to the OSHA Power Tools Safety Guide to keep your projects safe from start to finish.

Frequently Asked Questions

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

A: These M35 cobalt high-speed steel drill bits are designed to drill through a wide range of materials including stainless steel, iron, copper, aluminum, and wood. The cobalt content enhances heat resistance, making them especially effective on hard metals that would quickly dull standard HSS bits.

Q: What sizes are included in the drill bit sets?

A: The sets are available in 5, 6, 8, 13, and 19-piece configurations, covering bit sizes ranging from 1mm to 10mm. Please refer to the product images for the exact size breakdown for each kit option.

Q: Will these drill bits fit my cordless drill?

A: Yes. All bits feature a standard straight shank that is compatible with virtually all corded and cordless drills available on the market. No special adapters are required — they are ready to use right out of the box.

Q: What is the difference between HSS 6542 and 4241 steel grades?

A: HSS 6542 (M2) and 4241 (M1) refer to different high-speed steel alloy grades. M35 cobalt bits incorporate these alloy bases with added cobalt content (approximately 5%), which significantly increases hardness and heat resistance — ideal for drilling tough metals like stainless steel at higher speeds without losing their edge.

Q: Do the drill bits come with a storage case?

A: Yes! Every set comes packaged in a durable red plastic storage case with individual labeled slots for each drill bit, keeping your bits organized, protected, and easy to find when you need them.