---
product_id: 491280390
title: "STROTON Metric M42 8% Cobalt Drill Bits for Stainless Steel and Hard Metal (4.5mm x 5pcs)"
brand: "stroton"
price: "€ 34.73"
currency: EUR
in_stock: true
reviews_count: 5
category: "Stroton"
url: https://www.desertcart.it/products/491280390-stroton-metric-m42-8-cobalt-drill-bits-for-stainless-steel
store_origin: IT
region: Italy
---

# 3-5x faster drilling speed vs standard bits 68-70 HRC Rockwell Hardness for superior heat resistance M42 8% Cobalt Steel for extreme durability STROTON Metric M42 8% Cobalt Drill Bits for Stainless Steel and Hard Metal (4.5mm x 5pcs)

**Brand:** stroton
**Price:** € 34.73
**Availability:** ✅ In Stock

## Summary

> ⚡ Drill smarter, faster, and tougher — own the job site with STROTON!

## Quick Answers

- **What is this?** STROTON Metric M42 8% Cobalt Drill Bits for Stainless Steel and Hard Metal (4.5mm x 5pcs) by stroton
- **How much does it cost?** € 34.73 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.it](https://www.desertcart.it/products/491280390-stroton-metric-m42-8-cobalt-drill-bits-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

- • **Unmatched Durability:** Premium M42 cobalt alloy ensures long tool life and wear resistance
- • **Versatile Performance:** Effortlessly drills stainless steel, hard metals, aluminum, plastics & hardwood
- • **Precision Cutting Edge:** 135° split point eliminates walking for instant, accurate starts
- • **Cost-Effective Efficiency:** Lower cost per hole by drilling 3-5x faster with fewer replacements
- • **Pro-Level Heat Management:** Optimized for controlled RPM and cutting oils to prevent overheating

## Overview

The STROTON Metric M42 8% Cobalt Drill Bits set (4.5mm, 5pcs) features premium cobalt steel with a 68-70 HRC rating, delivering exceptional heat and wear resistance. Designed with a 135° split point for precise starts, these bits cut through stainless steel, hard metals, and more at speeds 3-5 times faster than standard bits, reducing overall drilling costs and downtime. Ideal for professionals demanding durability, speed, and versatility in one high-performance tool.

## Description

Product Advantages: (1) Sharp Edge starts drilling immediately with less force and eliminates "walking" across the work surface. (2) Holds up better than generic high-speed steel,Cobalt gives high-speed steel more heat and wear resistance. (3) This drill bits set is made of Premium Cobalt (80,000 dollars per ton).(4) The M42 metric cobalt drill bits can cut through Stainless steel and Hard metal,Hard wood, although they can be used for softer materials such as Aluminum,Plastic. Some Important Tips about drilling stainless steel and hard metal: (1)Controling the drill speed from 200 to 1000 RPM would make it easier for you to drill holes on stainless steel. ________________________________ 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 and forming a very hard oxide layer.It also works adding some vinegar,soy sauce or water if you don't have engine oil.

Review: Muito bom!! - Muito bom! Pensei que por ser uma marca desconhecida e um formato fora do comum que nao iam ser boas, pelo contrario, estao equiparadas ás bosch PRO, se nao ate melhores! Comprei para furar inox de 3mm, cerca de 40 furos, a da bosch fez uns 10/15, por norma com pre furo de 2 ou 3mm, estas usei UMA para fazer os restantes furos tambem com pre furo de 2 ou 3mm da bosch, muito satisfeito!
Review: Works on UHSS - So far this has been the best drill bit that Ive used so far to drill through automotive UHSS. Tesla to be precise. I was able to do make at least 5 holes with cutting oil, compared to 1 hole from other brands. Which were triple and more the cost. Definitely worth buying for these operations.

## 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 Desigh for Cutting through Stainless Steel,Hard Metals,Aluminum,Plastic and Hardwood.
- 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.
- Includes :M42 Cobalt drill bit 4.5mm x 5pcs ,135 Degree Split Point

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B08H1K1J29 |
| Best Sellers Rank | #68,263 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #292 in Power Drill Bit Sets |
| Brand | STROTON |
| Brand Name | STROTON |
| Customer Reviews | 4.4 out of 5 stars 587 Reviews |
| Cutting Angle String | 135 Degrees |
| Cutting Diameter | 4.5 Millimeters |
| Cutting angle string | 135 Degrees |
| Cutting diameter | 4.5 Millimeters |
| Finish Types | Uncoated |
| Finish type | Uncoated |
| Included Components | drill bits |
| Item Weight | 1 Pounds |
| Manufacturer | STROTON |
| Material | Cobalt |
| Material Type | Cobalt |
| Minimum Bore Diameter | 4.5 Millimeters |
| Model | M42 Cobalt-8( Independent Packaging) |
| Number of Flutes | 2 |
| Point Style | Split Point |
| Shank Type | Straight |
| Shank type | Straight |
| Surface Recommendation | Stainless Steel, Hard Metals, Aluminum, Plastic, Hardwood |
| Tool Flute Type | Spiral |
| Unit Count | 5 Count |

## Product Details

- **Cutting angle string:** 135 Degrees
- **Cutting diameter:** 4.5 Millimeters
- **Finish type:** Uncoated
- **Material:** Cobalt
- **Shank type:** Straight

## Images

![STROTON Metric M42 8% Cobalt Drill Bits for Stainless Steel and Hard Metal (4.5mm x 5pcs) - Image 1](https://m.media-amazon.com/images/I/71sJaal6vLL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Muito bom!!
*by N***O on 28 October 2025*

Muito bom! Pensei que por ser uma marca desconhecida e um formato fora do comum que nao iam ser boas, pelo contrario, estao equiparadas ás bosch PRO, se nao ate melhores! Comprei para furar inox de 3mm, cerca de 40 furos, a da bosch fez uns 10/15, por norma com pre furo de 2 ou 3mm, estas usei UMA para fazer os restantes furos tambem com pre furo de 2 ou 3mm da bosch, muito satisfeito!

### ⭐⭐⭐⭐⭐ Works on UHSS
*by J***N on 17 January 2026*

So far this has been the best drill bit that Ive used so far to drill through automotive UHSS. Tesla to be precise. I was able to do make at least 5 holes with cutting oil, compared to 1 hole from other brands. Which were triple and more the cost. Definitely worth buying for these operations.

### ⭐⭐⭐⭐⭐ Good quality bits
*by M***6 on 21 September 2024*

These things cut through the steel, pretty easy I couldn’t be happier with these.

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*Product available on Desertcart Italy*
*Store origin: IT*
*Last updated: 2026-01-24*