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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 more, its 135° split point and three-stage geometry deliver superior speed, accuracy, and durability, making it a top choice for professionals demanding efficiency and longevity.








| ASIN | B07MZQMPMC |
| Best Sellers Rank | #7,518 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #28 in Power Drill Bit Sets |
| Brand | STROTON |
| Brand Name | STROTON |
| Customer Reviews | 4.4 out of 5 stars 4,565 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 | 454 g |
| Manufacturer | STROTON |
| Material | Cobalt |
| Material Type | Cobalt |
| Minimum Bore Diameter | 1 Millimeters |
| Number of Flutes | 2 |
| 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 |
J**I
Good quality
Very good quality
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.
C**S
Very high quality drills
I am a metal worker for 23 years, hard to find any better cobalt drills. Highly recommended.
P**H
Excellent drill bits with an awesome warranty!!
I purchased these bits sometime ok...They are very sharp and cut into any material with ease and some cutting fluid of course!! However I did break a few on a project and dulled 4 bits...I contacted costumer service and within a few days they sent me a complete replacement with no questions asked.... Best companies costumer service I dealt with in forever!! Awesomeness!!
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
G**.
Ottime punte e ottimo venditore
Punte di ottima qualità, solo una a distanza di tempo si è spezzata. Ho scritto al venditore, il quale ha provveduto tempestivamente a inviarmi il ricambio. Venditore serio e professionale.
J**A
Brocas metálica
Gostei As brocas são muito boas
H**T
Good quality M42
Very good M42 grill bit. I used for 316 stein steel. It working well.
Trustpilot
5 days ago
3 days ago