---
product_id: 206579455
title: "Metric M42 8% Cobalt Twist Drill Bits Set for Stainless Steel and Hard Metal (1mm-10mm/19pcs)"
brand: "stroton"
price: "31.54 OMR"
currency: OMR
in_stock: true
reviews_count: 8
category: "Stroton"
url: https://www.desertcart.com.om/products/206579455-metric-m42-8-cobalt-twist-drill-bits-set-for-stainless
store_origin: OM
region: Oman
---

# 19pcs, 1-10mm in 0.5mm increments - Precision versatility 68-70 HRC Hardness - Superior heat & wear resistance M42 8% Cobalt Steel - Ultimate durability Metric M42 8% Cobalt Twist Drill Bits Set for Stainless Steel and Hard Metal (1mm-10mm/19pcs)

**Brand:** stroton
**Price:** 31.54 OMR
**Availability:** ✅ In Stock

## Summary

> 🔩 Drill smarter, faster, stronger — own the toughest jobs with Metric M42!

## Quick Answers

- **What is this?** Metric M42 8% Cobalt Twist Drill Bits Set for Stainless Steel and Hard Metal (1mm-10mm/19pcs) by stroton
- **How much does it cost?** 31.54 OMR with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.com.om](https://www.desertcart.com.om/products/206579455-metric-m42-8-cobalt-twist-drill-bits-set-for-stainless)

## 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

- • **Unmatched Durability:** Premium M42 cobalt steel ensures your bits outlast the competition, cutting through stainless steel and hard metals with ease.
- • **All-in-One Size Range:** 19-piece set from 1mm to 10mm in 0.5mm increments covers every project, from delicate plastics to tough metals.
- • **Speed Meets Precision:** Run 3-5x faster drilling with a sharp 135° split point design that reduces drift and boosts accuracy on every hole.
- • **Trusted by Pros & DIYers:** Highly rated for reliability and backed by responsive customer service, making it the go-to choice for serious drillers.
- • **Cost-Effective Performance:** Despite a higher upfront price, these bits deliver the lowest cost per hole thanks to extended tool life and faster drilling.

## Overview

The Metric M42 8% Cobalt Twist Drill Bits Set features 19 precision-engineered bits ranging from 1mm to 10mm, crafted from premium M42 cobalt steel with a 68-70 HRC hardness rating. Designed for superior heat, wear, and chip resistance, this set excels at drilling stainless steel, hard metals, aluminum, and plastics. Its 135° split point and spiral flute design enable faster, cleaner holes with less effort, making it a cost-effective, professional-grade solution for demanding metalworking tasks.

## Description

Premium M42 8% cobalt steel drill bits with 68-70 HRC deliver exceptional heat, wear, and chip resistance for faster, longer-lasting drilling through tough materials.

Review: Sharp and fast bits - Had a box for over a year now. One use was on quite a few bits of steel from old power pylons, fairly sturdy stuff, hand held drill due to location. Another use has been on galvanized steel field gates, again hand held drill. Holes are made very quickly compared to other bits I've used, but I am an occasional driller rather than professional. They may be more brittle than standard HSS bits as we had a 6mm snap and a few larger bits chip at the ends. I think more careful use could have avoided this but that's hard to do with a hand held drill in some situations. I contacted the seller about the broken bits and within a few days I had a full replacement set! I am seriously impressed with their customer service and warranty.
Review: Astonishingly good! - I have to say, I wasn’t expecting too much, but I needed some replacement 8% cobalt drills to take out a sheared off stainless bolt. These performed beautifully and the specially ground cutting edge allowed for less drift and thus more accuracy. These were very good value for money and did the job extremely well. Only tip, use either some lathe coolant or a good squirt or two of WD40. Don’t force the drill bit, keep steady pressure and allow the bit to cool a little if the job is quite big, especially on stainless. I was pleased and I think they were pretty good value for money.

## Features

- Premium M42 8% Cobalt Steel ,68-70 HRC (Rockwell Hardness Scale) ,Usually Give the Best Heat,Wear and Chip Resistance and Long Tool Life.
- 3 Steps Design for Cutting through Stainless Steel,Hard Metals,Aluminum,Plastic.
- This Cobalt Drill Bit is Typically Capable of Running Three to Five Times Faster.Despite the Higher Price,the Cost Per Hole When Using Cobalt Drill Bit Will be the Lowest,Since It Can Produce So Many More Holes.
- The Sufficiently Sharp Bit Edge Can Cut the Metal Material into Long Strips of Iron Chips rather than Slowly Grinding Throng the Material with a Blunt Drill Bit.
- 19Pcs 135 Degree Split Point Drill Bits Includes :1mm(length:3.4cm) 1.5mm 2mm 2.5mm 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:13cm) [DIA 0.5mm Increments] .

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B07MZQMPMC |
| Best Sellers Rank | 1,252 in Business, Industry & Science ( See Top 100 in Business, Industry & Science ) 3 in Metalworking & Multi-Purpose Drill Bit Sets |
| Brand | STROTON |
| Country Of Origin | China |
| Customer Reviews | 4.2 out of 5 stars 4,379 Reviews |
| Cutting Angle String | 90 Degrees |
| Cutting Diameter | 10 Millimetres |
| Cutting angle string | 90 Degrees |
| Cutting diameter | 10 Millimetres |
| Finish Types | Uncoated |
| Finish type | Uncoated |
| Item Weight | 454 g |
| Manufacturer | STROTON |
| Material | Cobalt |
| Minimum Bore Diameter | 1 Millimetres |
| Number of Flutes | 1 |
| Point Style | Split Point |
| 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 |

## Product Details

- **Cutting angle string:** 90 Degrees
- **Cutting diameter:** 10 Millimetres
- **Finish type:** Uncoated
- **Material:** Cobalt
- **Shank type:** Straight

## Images

![Metric M42 8% Cobalt Twist Drill Bits Set for Stainless Steel and Hard Metal (1mm-10mm/19pcs) - Image 1](https://m.media-amazon.com/images/I/71YyLQiGN8L.jpg)

## Available Options

This product comes in different **Size** options.

## 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

### ⭐⭐⭐⭐⭐ Sharp and fast bits
*by T***W on 7 August 2024*

Had a box for over a year now. One use was on quite a few bits of steel from old power pylons, fairly sturdy stuff, hand held drill due to location. Another use has been on galvanized steel field gates, again hand held drill. Holes are made very quickly compared to other bits I've used, but I am an occasional driller rather than professional. They may be more brittle than standard HSS bits as we had a 6mm snap and a few larger bits chip at the ends. I think more careful use could have avoided this but that's hard to do with a hand held drill in some situations. I contacted the seller about the broken bits and within a few days I had a full replacement set! I am seriously impressed with their customer service and warranty.

### ⭐⭐⭐⭐⭐ Astonishingly good!
*by D***D on 23 August 2025*

I have to say, I wasn’t expecting too much, but I needed some replacement 8% cobalt drills to take out a sheared off stainless bolt. These performed beautifully and the specially ground cutting edge allowed for less drift and thus more accuracy. These were very good value for money and did the job extremely well. Only tip, use either some lathe coolant or a good squirt or two of WD40. Don’t force the drill bit, keep steady pressure and allow the bit to cool a little if the job is quite big, especially on stainless. I was pleased and I think they were pretty good value for money.

### ⭐⭐⭐⭐ Decent Quality Bits At A Keen Price, Backed Up By Excellent Customer Service
*by M***N on 3 March 2021*

The item was sold at a keen price and delivered in double-quick time. I ordered the Cobalt drill bits because, having read the description, I believed they would be a more resilient bit than the normal HSS type, and would do the job of drilling out the sheared stub of a fixing bolt. However, I used two of the new bits to try and drill a pilot hole in the end of the stub and both of them very quickly blunted and lost their cutting edge, making no impression on the stub (I am unable to say what type of steel the sheared bolt stub was manufactured from). In view of this, and previously having blunted and broken several HSS bits, I was forced to abandon trying to remove the stub and used the Cobalt bits to drill a new hole through the 2mm steel sheeting which was easily achieved. And so, although the Cobalt bits didn't perform as I had hoped, they do appear to be quite a sturdy product and easily able to deal with cutting through reasonable thickness, normal steel, without a problem. As a result of the above, I contacted the seller to request replacement of the two damaged bits under the terms of their warranty. They not only responded immediately but did more than I anticipated, sending me a full new set of drill bits, as well as giving me a full refund on those initially purchased! What more could anyone ask for? If that's not excellent customer service, I don't know what is!! I recommend the company highly.

## Frequently Bought Together

- Metric M42 8% Cobalt Twist Drill Bits Set for Stainless Steel and Hard Metal (1mm-10mm/19pcs)
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*Product available on Desertcart Oman*
*Store origin: OM*
*Last updated: 2026-01-29*