---
product_id: 157079330
title: "BOSCH CO2159B 1-Piece 1/2 In. x 6 In. Cobalt M42 Metal Drill Bit with Three-Flat Shank for Drilling Applications in Stainless Steel, Cast Iron, Titanium, Light-Gauge Metal, Aluminum"
brand: "bosch"
price: "€ 42.25"
currency: EUR
in_stock: true
reviews_count: 11
category: "Bosch"
url: https://www.desertcart.fi/products/157079330-bosch-co2159b-1-piece-1-2-in-x-6-in
store_origin: FI
region: Finland
---

# High-heat resistance for tough jobs Three-flat shank for superior grip 8% Cobalt M42 alloy for 10x durability BOSCH CO2159B 1-Piece 1/2 In. x 6 In. Cobalt M42 Metal Drill Bit with Three-Flat Shank for Drilling Applications in Stainless Steel, Cast Iron, Titanium, Light-Gauge Metal, Aluminum

**Brand:** bosch
**Price:** € 42.25
**Availability:** ✅ In Stock

## Summary

> 🛠️ Drill Like a Pro, Last Like a Legend!

## Quick Answers

- **What is this?** BOSCH CO2159B 1-Piece 1/2 In. x 6 In. Cobalt M42 Metal Drill Bit with Three-Flat Shank for Drilling Applications in Stainless Steel, Cast Iron, Titanium, Light-Gauge Metal, Aluminum by bosch
- **How much does it cost?** € 42.25 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.fi](https://www.desertcart.fi/products/157079330-bosch-co2159b-1-piece-1-2-in-x-6-in)

## Best For

- bosch enthusiasts

## Why This Product

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

## Key Features

- • **Rock-Solid Stability:** Thick web-helix design enhances bit strength and fast material removal, so you power through metals with confidence.
- • **Unmatched Durability:** Engineered with 8% Cobalt M42 alloy delivering 10x longer life than standard bits—built to outlast your toughest projects.
- • **Ergonomic Grip Upgrade:** Three-flat shank design guarantees a secure fit in your drill chuck, reducing slippage and maximizing torque transfer.
- • **Heat-Resistant Powerhouse:** Withstands extreme temperatures without losing edge, perfect for stainless steel, titanium, and cast iron drilling.
- • **Precision Start Every Time:** Split-point tip eliminates skating and the need for a center punch, ensuring flawless, accurate drilling from the first touch.

## Overview

The BOSCH CO2159B is a premium 1/2 In. x 6 In. Cobalt M42 metal drill bit crafted with 8% cobalt alloy for exceptional durability and heat resistance. Designed for professional-grade drilling in stainless steel, cast iron, titanium, and other hard metals, it features a split-point tip for precise starts and a three-flat shank for superior grip. Engineered to deliver 10x longer life than standard bits, this drill bit is the ultimate tool upgrade for demanding metalworking tasks.

## Description

BOSCH Cobalt M42 metal drill bits are engineered with upgraded M42 alloy, containing 8% cobalt. These hard-core Cobalt bits deliver 10x life vs. Standard bits, are jobber length and withstand high-heat applications. The thick web-helix design delivers fast material removal and increased stability. Bits that are 1/8 in. And larger feature a split point; bits 3/16 in. And larger feature a three-flat shank, for better bit grip. These Cobalt drill bits provide superior performance in stainless steel and can be used to drill cast iron, titanium and other hard or abrasive metals.

Review: very good service - top class
Review: Cobalt drill bits - Quality sharp metal steel drill bits for the workshop. Bosch= Good Quality.

## Features

- Cobalt M42 drill bit – provides upgraded M42 Cobalt jobber-length bits designed for durability, high heat resistance and Hardened surface for stainless steel, cast iron, titanium, light-gauge metal and aluminum
- Enhanced M42 alloy material – contains 8% Cobalt alloy that delivers 10x life vs. Standard bits
- High-heat resistant bits – withstand high-temperature applications for extended periods of time
- Thick web-helix design – provides additional stability in tough applications
- Surface-hardened tip – penetrates tough abrasive materials
- Split points on bits 1/8 In. and larger – allow for easy starts with no skating, eliminating the need for a center punch
- Three-flat shank on bits 3/16 In. and larger – deliver better bit grip

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B07Q8DPV56 |
| Batteries Required? | No |
| Batteries included? | No |
| Best Sellers Rank | 69,797 in DIY & Tools ( See Top 100 in DIY & Tools ) 262 in Jobber Drill Bits |
| Colour | Multi |
| Customer Reviews | 4.6 4.6 out of 5 stars (6,549) |
| Date First Available | 1 Jan. 2024 |
| Finish | Titanium |
| Included Components | (1) 1/2 In. X 6 In. Cobalt M42 Drill Bit |
| Item Package Quantity | 1 |
| Item Weight | 109 g |
| Item model number | CO2159B |
| Manufacturer | BOSCH |
| Material | Cobalt |
| Measurement System | Inch |
| Number of Pieces | 1 |
| Part Number | CO2159B |
| Pattern | Solid |
| Power Source | Hand_powered |
| Shape | Rectangular |
| Size | 1/2 In. X 6 In. |
| Style | Classic |

## Product Details

- **Cutting angle string:** 135 Degrees
- **Cutting diameter:** 0.5 Inches
- **Finish type:** Titanium
- **Material:** Cobalt
- **Shank type:** 3-Flat

## Images

![BOSCH CO2159B 1-Piece 1/2 In. x 6 In. Cobalt M42 Metal Drill Bit with Three-Flat Shank for Drilling Applications in Stainless Steel, Cast Iron, Titanium, Light-Gauge Metal, Aluminum - Image 1](https://m.media-amazon.com/images/I/31cmD+BRUFL.jpg)
![BOSCH CO2159B 1-Piece 1/2 In. x 6 In. Cobalt M42 Metal Drill Bit with Three-Flat Shank for Drilling Applications in Stainless Steel, Cast Iron, Titanium, Light-Gauge Metal, Aluminum - Image 2](https://m.media-amazon.com/images/I/417AhMmxSlL.jpg)
![BOSCH CO2159B 1-Piece 1/2 In. x 6 In. Cobalt M42 Metal Drill Bit with Three-Flat Shank for Drilling Applications in Stainless Steel, Cast Iron, Titanium, Light-Gauge Metal, Aluminum - Image 3](https://m.media-amazon.com/images/I/41MxYOTVniL.jpg)
![BOSCH CO2159B 1-Piece 1/2 In. x 6 In. Cobalt M42 Metal Drill Bit with Three-Flat Shank for Drilling Applications in Stainless Steel, Cast Iron, Titanium, Light-Gauge Metal, Aluminum - Image 4](https://m.media-amazon.com/images/I/41VGnisS1iL.jpg)
![BOSCH CO2159B 1-Piece 1/2 In. x 6 In. Cobalt M42 Metal Drill Bit with Three-Flat Shank for Drilling Applications in Stainless Steel, Cast Iron, Titanium, Light-Gauge Metal, Aluminum - Image 5](https://m.media-amazon.com/images/I/41Xn8Z+58LL.jpg)

## Available Options

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

## Customer Reviews

### ⭐⭐⭐⭐⭐ very good service
*by E***H on 18 November 2025*

top class

### ⭐⭐⭐⭐⭐ Cobalt drill bits
*by M***M on 11 September 2025*

Quality sharp metal steel drill bits for the workshop. Bosch= Good Quality.

### ⭐⭐⭐⭐⭐ well worth paying a bit more for quality
*by G***N on 6 May 2025*

Normally use cheap drill bits but all the ones I had really struggled when drilling out a bolt. These ones made my life so much easier and saved me a lot of time. Always use a bit of cutting oil/spray when drilling metal and these are still sharp after use and hardly a scratch on them.

## Frequently Bought Together

- BOSCH CO2159B 1-Piece 1/2 In. x 6 In. Cobalt M42 Metal Drill Bit with Three-Flat Shank for Drilling Applications in Stainless Steel, Cast Iron, Titanium, Light-Gauge Metal, Aluminum
- Yellow Paw 1/2 Inch Drill Bit for Metal - Industrial Grade M35 Cobalt with TiAIN Coating - 1/2" Diameter & 6" Length - 4" Working Length - 135 Degree Split Point
- Meccion Cobalt Drill Bit 5/8 Inch High Speed Steel M35 Reduced Shank Twist Drill Bit for Metal, Cast Iron, Stainless Steel, Alloy, Non-Ferrous Etc.

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*Product available on Desertcart Finland*
*Store origin: FI*
*Last updated: 2026-03-02*