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⚡ Drill Smarter, Not Harder — Own the Power of Precision!
The STROTON Metric M42 8% Cobalt Twist Drill Bits Set features 19 precision-engineered bits ranging from 1mm to 10mm, crafted from high-grade cobalt steel with 68-70 HRC hardness. Designed for stainless steel, hard metals, and hardwood, its 135° split point and three-stage design enable 3-5x faster drilling with superior heat and wear resistance, making it the ultimate choice for professionals demanding speed, durability, and precision.
| ASIN | B07MZQMPMC |
| Best Sellers Rank | #2,142 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #13 in Drill Bits |
| Brand | STROTON |
| Brand Name | STROTON |
| Customer Reviews | 4.4 out of 5 stars 4,744 Reviews |
| Cutting Angle String | 135 Degrees |
| Cutting Diameter | 10 Millimeters |
| Cutting angle string | 135 Degrees |
| Cutting diameter | 10 Millimeters |
| Finish Types | Uncoated |
| Finish type | Uncoated |
| Item Weight | 1 Pounds |
| Manufacturer | STROTON |
| Material | Cobalt |
| Material Type | Cobalt |
| Minimum Bore Diameter | 1 Millimeters |
| Number of Flutes | 2 |
| Number of Packs | 1 |
| Number of Pieces | 19 |
| Part Number | M42 Cobalt-8(19pcs) |
| Point Style | Split Point |
| Set Name | M42 8% Cobalt Metal Drill Bit Set for Stainless Steel and Hard Metal (19 Piece) |
| Shank Type | Straight |
| Shank type | Straight |
| Surface Recommendation | Stainless Steel, Hard Metal, Hardwood, Aluminum, Plastic |
| Tool Flute Type | Spiral |
| UPC | 743829466298 |
| Unit Count | 1 Count |
B**E
Very good drill bits
Great drill bits. They cut through stainless steel very nicely if you take your time and use a cutting fluid to keep them cool. Had a minor issue with one of the bits snapping (my fault) but the seller took care of the issue immediately and was very responsive.
J**I
Good quality
Very good quality
C**S
Very high quality drills
I am a metal worker for 23 years, hard to find any better cobalt drills. Highly recommended.
C**L
Beter dan verwacht
Deze boren zijn beter dan verwacht
C**N
Excelente producto
Puedes hacer agujeros con facilidad en metales duros como inox 316
C**S
They do drill stainless steel!
At first I was a bit discouraged as per instructions I was using low speed drilling. It was not going through stainless steel at all. Then I switched to high speed and this was when the drill started to made it through with ease! Just to mention here that bits (Titanium coated) from Canadian Tire were absolutely useless!!!! No sign of overheating, bits stayed sharp through at least 10 holes for my first project using these new drill bits. I hope it will continue for years to come. Added on November 28, 2025. This set is amazing! Drills through SS almost as through wood. I use drill press with medium speed. No overheating or strange noises. Just goes through at steady speed. Highly recommended!
K**I
Si duran
Las compré para inoxidables y se soporta las cargas como todo con el uso prolongado van perdiendo filo pero dura bastante para su precio
A**N
So far, so good.
This set of drill bits had all the bits I needed for the job it was purchased for. At this stage they are handling the job and lasting. Looks like the right tool for the job, so far.
Trustpilot
2 weeks ago
3 weeks ago