---
product_id: 766631610
title: "Metric M42 8% Cobalt Twist Drill Bit for Stainless Steel and Hard Metals(1mm-10mm / 19pcs)"
brand: "stroton"
price: "464 zł"
currency: PLN
in_stock: true
reviews_count: 5
category: "Stroton"
url: https://www.desertcart.pl/products/766631610-metric-m42-8-cobalt-twist-drill-bit-for-stainless-steel
store_origin: PL
region: Poland
---

# 3-5x Faster Drilling Speed - max efficiency 68-70 HRC Rockwell Hardness - heat & abrasion resistant M42 8% Cobalt Steel - ultra durable Metric M42 8% Cobalt Twist Drill Bit for Stainless Steel and Hard Metals(1mm-10mm / 19pcs)

**Brand:** stroton
**Price:** 464 zł
**Availability:** ✅ In Stock

## Summary

> ⚡ Drill Like a Pro, Last Like a Legend

## Quick Answers

- **What is this?** Metric M42 8% Cobalt Twist Drill Bit for Stainless Steel and Hard Metals(1mm-10mm / 19pcs) by stroton
- **How much does it cost?** 464 zł with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.pl](https://www.desertcart.pl/products/766631610-metric-m42-8-cobalt-twist-drill-bit-for-stainless-steel)

## Best For

- stroton enthusiasts

## Why This Product

- Trusted stroton brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Speed Meets Strength:** Drill 3-5x faster through stainless steel and hard metals without dulling
- • **Versatile 19-Piece Set:** Covers 1mm to 10mm in 0.5mm increments for every project need
- • **Premium M42 Cobalt Alloy:** Engineered for extreme heat & abrasion resistance, outlasting standard bits
- • **Trusted Customer Support:** Hassle-free replacements ensure your toolkit stays unstoppable
- • **Precision 3-Step Split Point:** Eliminates walking for razor-sharp starts every time

## Overview

The Metric M42 8% Cobalt Twist Drill Bit Set features 19 precision-engineered bits ranging from 1mm to 10mm, crafted from premium M42 cobalt steel with 68-70 HRC hardness. Designed with a 3-step split point tip, these bits deliver superior heat and abrasion resistance, enabling 3-5 times faster drilling through stainless steel, hard metals, aluminum, and plastics. Ideal for professionals demanding durability, speed, and precision, backed by responsive customer service.

## Description

Product Benefits: (1) The 3-step design tip starts drilling, eliminating "walking" across the work surface. (2)It has better resistance than common high speed steel, cobalt gives more heat resistance and abrasion resistance. (3) This drill bit set is made of premium cobalt ($80,000 per ton). (4) M42 Metric Cobalt Drill Bits can also be used for soft materials such as aluminum, plastic, but can cut stainless steel, hard metal, and hardwood. Important Tips for Drilling Stainless Steel and Hard Metals: (1) Control the drill speed from 200 to 1000 RPM, making drilling in the stainless steel easier. ________________________________ Stainless Steel ____________________________ Drill Diameter RPM ____________________________ ≤5mm, , , 1000-700 ____________________________ 5-10mm , , , 700-350 ____________________________ 10-15mm , , , 350-200 ________________________________ (2) Add stainless steel tapping oil or engine oil to prevent the stainless steel from overheating to form a very hard oxidation layer. If there is no engine oil, you can also add vinegar, soy sauce and water.

Review: Punte quasi perfette - Testate su acciaio da 5mm forando con la n.4 come pilota e sembra indistruttibile, le altre più grandi le usate solo per allargare il foro. La 4,5 usata come pilota si è spaccata al solo contatto con il pezzo, alcune si sono scheggiate lateralmente, probabilmente difetti di fabbricazione. Ho contattato il fornitore che mi ha subito inviato le punte in sostituzione, solo per questo meriterebbe 10 stelle. Provate su barra in ferro da 5mm e forano come se fosse burro. Consiglio pienamente l'acquisto.
Review: 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!!

## Features

- Premium M42 8% Cobalt Steel, 68-70 HRC (Rockwell hardness scale), usually provides the best heat, abrasion resistance, chip resistance, and long life
- 3 step design for cutting stainless steel, hard metal, aluminum and plastic
- This cobalt drill bit can run 3-5 times faster than usual. The price is expensive, but the cost of puncturing when using cobalt drill bits
- The bit edge is sharp enough to cut metal materials into long strips of iron chips instead of slowly grinding materials with dull drill bits
- 19 Pieces 135 Degree Split Point Drill Bits Contents: 1mm (Length: 3.4cm) 1.5mm 2mm 2.5mm 3mm 3mm 3.5mm 4mm 4.5mm 5mm Length: 8.5cm) 5.5mm 6mm Length: 9cm 6.5mm 7mm 7.5mm 8mm Length: 11.5cm 8.5mm 9mm 9.5mm 10mm Length: 10mm 0.5 inches (13 mm) DIA 0] in .5mm increments

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B07MZQMPMC |
| Amazon Bestseller | #596,941 in DIY, Tools & Garden ( See Top 100 in DIY, Tools & Garden ) #53 in Short Length Drill Bits |
| Brand | STROTON |
| Brand Name | STROTON |
| Customer Reviews | 4.4 out of 5 stars 3,665 Your Review |
| Cutting Angle String | 90 Degrees |
| Cutting Diameter | 1-10mm (DIA 0.5mm Increments) Millimeters |
| Finish Type | Hardened |
| Finish Types | Hardened |
| Included Components | Drill Bit |
| Item Weight | 454 g |
| Manufacturer | STROTON |
| Material | Cobalt |
| Material Type | Cobalt |
| Minimum Bore Diameter | 1 Millimeters |
| Number of Flutes | 1 |
| Point Style | Split Point |
| Shank Type | Straight |
| Surface Recommendation | Wood |
| Tool Flute Type | Spiral |
| UPC | 743829466298 |
| Unit Count | 1 Count |

## Product Details

- **Material:** Cobalt
- **Cutting Diameter:** 1-10mm (DIA 0.5mm Increments) Millimeters
- **Finish Type:** Hardened
- **Shank Type:** Straight
- **Cutting Angle String:** 90 Degrees

## Images

![Metric M42 8% Cobalt Twist Drill Bit for Stainless Steel and Hard Metals(1mm-10mm / 19pcs) - Image 1](https://m.media-amazon.com/images/I/51O0xcS5vrL.jpg)
![Metric M42 8% Cobalt Twist Drill Bit for Stainless Steel and Hard Metals(1mm-10mm / 19pcs) - Image 2](https://m.media-amazon.com/images/I/51dgpHvzjSL.jpg)
![Metric M42 8% Cobalt Twist Drill Bit for Stainless Steel and Hard Metals(1mm-10mm / 19pcs) - Image 3](https://m.media-amazon.com/images/I/51mSOKDFsAL.jpg)
![Metric M42 8% Cobalt Twist Drill Bit for Stainless Steel and Hard Metals(1mm-10mm / 19pcs) - Image 4](https://m.media-amazon.com/images/I/61MlAqLl6WL.jpg)
![Metric M42 8% Cobalt Twist Drill Bit for Stainless Steel and Hard Metals(1mm-10mm / 19pcs) - Image 5](https://m.media-amazon.com/images/I/71VWf6drWlL.jpg)

## Questions & Answers

**Q: Can these drill through a car's trunk without any issues?**
A: These are made to drill through thick hard steel. Thus are very hard and brittle and will break easily if improper angle is applied. For drilling trunk or locks use a titanium bit and buy a few of them as they dull quick but get the job done.

**Q: Bought the 19 pc set; 3mm but broke immediately. Can anyone point me to where I can buy replacement? Thank you.**
A: Hi,I am the seller. You need to click  the blue word [STROTON] in  "Sold by STROTON and Fulfilled by Amazon" below the "Add to Cart" of this Drill bit's listing.
Then click [Ask a question] that write the condtion simply to Establish contact channels with me through Amazon message system.     Then I can handle the follow-up to your order.

Best regards
STROTON

**Q: Can they drill titanium**
A: Honestly,They are good for drilling steel and do the job well.
But Titanium alloy has very high hardness. And We can't guarantee.
If it doesn't work well, you could return it. If it works（Lubricant Must Be Used）, you could share it with other customers.

**Q: What is the length of these bits?**
A: They are average lengths.  The 1mm is 3.4cm and length increase proportionally to the 10mm which is 5.4cm.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Punte quasi perfette
*by A***R on March 13, 2024*

Testate su acciaio da 5mm forando con la n.4 come pilota e sembra indistruttibile, le altre più grandi le usate solo per allargare il foro. La 4,5 usata come pilota si è spaccata al solo contatto con il pezzo, alcune si sono scheggiate lateralmente, probabilmente difetti di fabbricazione. Ho contattato il fornitore che mi ha subito inviato le punte in sostituzione, solo per questo meriterebbe 10 stelle. Provate su barra in ferro da 5mm e forano come se fosse burro. Consiglio pienamente l'acquisto.

### ⭐⭐⭐⭐⭐ Excellent drill bits with an awesome warranty!!
*by P***H on September 13, 2024*

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!!

### ⭐⭐⭐⭐⭐ Si duran
*by K***I on August 16, 2023*

Las compré para inoxidables y se soporta las cargas como todo con el uso prolongado van perdiendo filo pero dura bastante para su precio

## Frequently Bought Together

- Metric M42 8% Cobalt Twist Drill Bits Set for Stainless Steel and Hard Metal (1mm-10mm/19pcs)
- Tap Magic 30004P ProTap Cutting Fluid, 4 oz. Size
- MACXCOIP Cobalt Drill Bit Set, 115Pcs M35 High Speed Steel Bits for Hardened Metals, Stainless Steel, Cast Iron and Wooden Plastics, with Metal Index Storage Box

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*Product available on Desertcart Poland*
*Store origin: PL*
*Last updated: 2026-01-29*