3-8mm Pack Cobalt Drill Bit Set
What’s Included
Cobalt drill bit set, sizes 3–8mm, 6pcs:
- 3mm
- 4mm
- 5mm
- 6mm
- 6.5mm
- 8mm
Specifications
Material: cobalt-infused (M35) steel.
Size range: 3mm–8mm.
Best for: stainless steel, cast iron, and other hard metals.
Storage: organized carrying case — confirm exact piece count from supplier listing.
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3-8mm Pack Cobalt Drill Bit Set
Drill Through Anything
Standard bits dull fast or snap under pressure when they hit hardened metal. This cobalt-steel drill bit set is built to handle stainless steel, cast iron, and other tough materials without losing its edge.
Heat Resistant, Hole After Hole
Cobalt steel construction holds up under the heat and friction that wear down standard bits, giving you clean, precise holes even through hardened metal.
A Range of Sizes, One Organized Case
Covering 3mm to 8mm, this set handles most common metal-drilling jobs without switching bit sets — everything stored in one case, ready when you need it.
Built for Metal & More
🔩 Metal Fabrication — clean holes in steel and aluminum
🚗 Automotive Repairs — drilling through hardened parts
🏭 Industrial Projects — reliable performance under repeated use
🔧 General Workshop Use — one set for most metal-drilling jobs
Select, Drill, Done
Choose the bit size that matches your job, fit it into your drill, and let the cobalt-steel edge cut cleanly through metal without the excess heat buildup that dulls standard bits.
Tools That Keep Their Edge
A drill bit that dulls halfway through the job costs you time and a replacement. This cobalt set is built to outlast standard steel, holding a sharp edge through repeated use on the toughest materials.
You Have Questions? We Have Answers!
FAQ'S
What size range does this set cover?
The set covers sizes from 3mm to 8mm.
What materials can these bits drill through?
They're designed for stainless steel, cast iron, and other hard metals, in addition to standard wood and plastic.
Do I need a special drill to use these?
No, they work with any standard power drill.
How many bits are included per size?
6 pcs
- 3mm
- 4mm
- 5mm
- 6mm
- 6.5mm
- 8mm
Are these reusable after heavy use?
Cobalt steel is built to hold its edge longer than standard steel, though like any bit, performance depends on usage and material hardness.