---
product_id: 145184278
title: "BOSCH CO14B 14-Piece Cobalt Drill Bit Set with Included Case - M42 Metal Drill Bits with Three-Flat Shank for Drilling Applications in Stainless Steel, Cast Iron, Titanium, and Light-Gauge Metal"
brand: "bosch"
price: "367.15 DT"
currency: TND
in_stock: true
reviews_count: 13
category: "Bosch"
url: https://www.desertcart.tn/products/145184278-bosch-co14b-14-piece-cobalt-drill-bit-set-with-included
store_origin: TN
region: Tunisia
---

# High-heat resistance for tough metals 8% cobalt M42 alloy for 10x durability Three-flat shank for slip-free grip BOSCH CO14B 14-Piece Cobalt Drill Bit Set with Included Case - M42 Metal Drill Bits with Three-Flat Shank for Drilling Applications in Stainless Steel, Cast Iron, Titanium, and Light-Gauge Metal

**Brand:** bosch
**Price:** 367.15 DT
**Availability:** ✅ In Stock

## Summary

> ⚡ Drill Like a Pro, Last Like a Legend

## Quick Answers

- **What is this?** BOSCH CO14B 14-Piece Cobalt Drill Bit Set with Included Case - M42 Metal Drill Bits with Three-Flat Shank for Drilling Applications in Stainless Steel, Cast Iron, Titanium, and Light-Gauge Metal by bosch
- **How much does it cost?** 367.15 DT with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.tn](https://www.desertcart.tn/products/145184278-bosch-co14b-14-piece-cobalt-drill-bit-set-with-included)

## 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

- • **Stable & Secure Grip:** Three-flat shank design prevents slipping, maximizing control and accuracy during demanding projects.
- • **Unmatched Durability:** Engineered with 8% cobalt M42 alloy delivering 10x longer life than standard bits.
- • **Versatile Size Range:** Includes 14 sizes from 1/16" to 1/2", perfect for any professional or DIY metal drilling task.
- • **Heat-Resistant Precision:** Withstands extreme temperatures, ensuring consistent performance on stainless steel, titanium, and cast iron.
- • **Optimized Cutting Efficiency:** Thick web-helix and split point tips enable fast material removal and precise, clean holes every time.

## Overview

The BOSCH CO14B 14-Piece Cobalt Drill Bit Set features premium M42 cobalt alloy bits with 8% cobalt content, delivering 10x the lifespan of standard bits. Designed for high-heat resistance and durability, these bits excel in drilling stainless steel, cast iron, titanium, and light-gauge metals. The set includes 14 versatile sizes with a three-flat shank for secure grip and a thick web-helix design for enhanced stability and fast cutting. Ideal for professionals and serious DIYers seeking precision and longevity in metal drilling.

## Description

BOSCH Cobalt M42 metal drill bits are engineered with an 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. Ideal for diy projects, maintenance and repair, and metalworking; these twist drill bits provide dependable performance for diyers tackling tasks around the home or garage. The thick web-helix design of metal drill bit set for steel delivers fast material removal and increased stability for precision drilling and metal drilling. 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. Designed as part of the BOSCH tools collection, 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: Premium Drill Bit That Powers Through Metal Effortlessly - This BOSCH Cobalt M42 3/8" drill bit performs extremely well, especially on hard metals. It made drilling feel almost effortless. Fit: Fits securely in standard drill chucks thanks to the three-flat shank design, with no slipping during use. Size: The 3/8" size is accurate and consistent, making clean and precise holes in various materials. Ease of Use: Very easy to use. It stays stable while drilling and doesn’t require excessive force to cut through tough metal. Compatibility: Works well across a range of materials including stainless steel, cast iron, and aluminum without issue. Case: Packaging is simple and protective enough to keep the bit safe during storage and transport. Appearance: Clean, professional look with a solid cobalt finish that reflects its heavy-duty design. Overall, this drill bit performs like a high-quality tool should. It cut through hard metal almost like melted butter, making it a reliable choice for demanding drilling tasks.
Review: Best bits for drilling metal I have ever used - I bought the 14-piece cobalt set (upgrade over the Bosch titanium sets) almost two years ago (Jan 2024). I have been impressed enough with their performance to feel compelled to come back and review them, as well as buy a larger set (21-piece cobalt, which has a few sizes and duplicates that the 14-piece set doesn't include). In addition to occasional use of various sizes over the last two years on wood, PVC pipe, and aluminum, I used two of the bits in a single project to drill over a hundred holes in mild steel angle iron and rectangular tubing. I used a drill press, set up at a slower speed, along with plenty of cutting oil (sometimes reapplying midway through drilling a hole). In line with other bits I've used in the past, I expected the two bits I was repeatedly using to dull to the point of uselessness part-way through the project. Much to my surprise, both bits survived and still cut practically like they are new. Bottom line, if you are using these bits to drill into mild steel with a drill press set at a slower speed and generous application of cutting oil, these bits are a fantastic choice. I have also used these bits to drill into aluminum, PVC pipe, and woods of various hardnesses with absolutely no issues. Highly recommend any of the Bosch M42 cobalt bits.

## Features

- Enhanced M42 Alloy Material: These drill bits for metal contain an 8% cobalt alloy that delivers 10x life vs. Standard bits
- Cobalt M42 Drill Bit: Provides upgraded M42 cobalt drill bits, jobber-length bits designed for durability, high heat resistance and Hardened surface for stainless steel, cast iron, titanium, light-gauge metal and aluminum
- Surface-hardened Tip: The Cobalt drill bits for hardened steel penetrate tough, abrasive materials
- High-heat Resistant Bits: This drill bit set for metal withstands high-temperature applications for extended periods of time
- Thick Web-helix Design: The BOSCH drill bit set features a thick web-helix design that provides additional stability in tough applications
- Includes: A versatile drill bit for metal assortment featuring 1/16", 5/64", 3/32", 7/64", 1/8", 9/64", 5/32", 3/16", 7/32", 1/4", 5/16", 3/8", and 1/2" sizes

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B07Q9HNTBH |
| Best Sellers Rank | #1,887 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #4 in Jobber Drill Bits |
| Brand | Bosch |
| Brand Name | Bosch |
| Customer Reviews | 4.6 out of 5 stars 7,107 Reviews |
| Cutting Angle String | 135 Degrees |
| Cutting Diameter | 0.5 Inches |
| Finish Type | Titanium |
| Finish Types | Titanium |
| Global Trade Identification Number | 00000346594591 |
| Included Components | 14 Drill Bits; Case |
| Item Dimensions | 7.2 x 5.6 x 1.8 inches |
| Item Type Name | Bosch CO14B 14 pc. Cobalt M42 Drill Bit Set |
| Item Weight | 1 Pounds |
| Manufacturer | BOSCH |
| Material | Cobalt |
| Material Type | Cobalt |
| Minimum Bore Diameter | 0.06 Inches |
| Model | CO14B |
| Number of Flutes | 3 |
| Number of Pieces | 14 |
| Part Number | CO14B |
| Point Style | Split Point |
| Set Name | 14-Piece Cobalt M42 Metal Drill Bit Set |
| Shank Type | 3-Flat |
| Surface Recommendation | Cast Iron,Metal,Metals,Stainless Steel |
| Tool Flute Type | Spiral |
| UPC | 000346594591 |
| Unit Count | 14.0 Count |
| Warranty Description | Product Defects Only |

## Product Details

- **Cutting Angle String:** 135 Degrees
- **Cutting Diameter:** 0.5 Inches
- **Finish Type:** Titanium
- **Material:** Cobalt
- **Shank Type:** 3-Flat

## Images

![BOSCH CO14B 14-Piece Cobalt Drill Bit Set with Included Case - M42 Metal Drill Bits with Three-Flat Shank for Drilling Applications in Stainless Steel, Cast Iron, Titanium, and Light-Gauge Metal - Image 1](https://m.media-amazon.com/images/I/81Nu8e18JaL.jpg)

## Available Options

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

## Questions & Answers

**Q: Length of the bits for each diameter?**
A: "Hi there, please see the following model with diameter and length size of the bits that comes in CO14B;
CO2131 - 1/16"" - 1.875""
CO2132 -  5/64"" - 2.0""
CO2133 - 3/32"" - 2.5""
CO2134 - 7/64"" - 2.625""
CO2135 - 1/8"" - 2.75""
CO2136 - 9/64"" - 2.875""
CO2137 - 5/32"" - 3.125""
CO2139B - 3/16"" - 3.5""
CO4141 -  7/32"" - 3.75""
CO2145 - 1/4"" - 4.5""
CO2147 - 5/16""  - 4.5""
CO2151 - 3/8"" - 5.0""
CO2159  1/2"" - 6.0""
For further assistance, contact us at 1-877-BOSCH99 (1-877-267-2499) from Mon-Fri 7A-7P CST."

**Q: Where is the 5/64" individual bit? (The only one I need to replace, of course!)**
A: You always have to order any single bit or bit replacement separately, unless you can convince the company otherwise.

**Q: Does Bosch make a metric set????**
A: This COB14B Drill bit set is at a standard or imperial measurement. For further assistance, contact us at 1-877-BOSCH99 (1-877-267-2499) from Mon-Fri 7A-7P CST.

**Q: Do either of the sets come with a bit holder? If not, what size bit holder would work?**
A: The CO14B set doesn't come with a bit holder. The bits will work with drills that caters straight shank bits and three-flat shank bits. For further assistance, contact us at 1-877-BOSCH99 (1-877-267-2499) from Mon-Fri 7AM-7PM CST.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Premium Drill Bit That Powers Through Metal Effortlessly
*by J***F on April 23, 2026*

This BOSCH Cobalt M42 3/8" drill bit performs extremely well, especially on hard metals. It made drilling feel almost effortless. Fit: Fits securely in standard drill chucks thanks to the three-flat shank design, with no slipping during use. Size: The 3/8" size is accurate and consistent, making clean and precise holes in various materials. Ease of Use: Very easy to use. It stays stable while drilling and doesn’t require excessive force to cut through tough metal. Compatibility: Works well across a range of materials including stainless steel, cast iron, and aluminum without issue. Case: Packaging is simple and protective enough to keep the bit safe during storage and transport. Appearance: Clean, professional look with a solid cobalt finish that reflects its heavy-duty design. Overall, this drill bit performs like a high-quality tool should. It cut through hard metal almost like melted butter, making it a reliable choice for demanding drilling tasks.

### ⭐⭐⭐⭐⭐ Best bits for drilling metal I have ever used
*by J***R on November 30, 2025*

I bought the 14-piece cobalt set (upgrade over the Bosch titanium sets) almost two years ago (Jan 2024). I have been impressed enough with their performance to feel compelled to come back and review them, as well as buy a larger set (21-piece cobalt, which has a few sizes and duplicates that the 14-piece set doesn't include). In addition to occasional use of various sizes over the last two years on wood, PVC pipe, and aluminum, I used two of the bits in a single project to drill over a hundred holes in mild steel angle iron and rectangular tubing. I used a drill press, set up at a slower speed, along with plenty of cutting oil (sometimes reapplying midway through drilling a hole). In line with other bits I've used in the past, I expected the two bits I was repeatedly using to dull to the point of uselessness part-way through the project. Much to my surprise, both bits survived and still cut practically like they are new. Bottom line, if you are using these bits to drill into mild steel with a drill press set at a slower speed and generous application of cutting oil, these bits are a fantastic choice. I have also used these bits to drill into aluminum, PVC pipe, and woods of various hardnesses with absolutely no issues. Highly recommend any of the Bosch M42 cobalt bits.

### ⭐⭐⭐⭐⭐ 100% worth the cost
*by J***M on November 23, 2024*

Anything bosch makes is good, but i feel like they have it down pat when it comes to stuff like twist drills and bits. The M42 cobalt keeps the drill from getting too hot and also acts as a "lubricant", both contributing to keeping a sharp cutting edge, giving it quality and ease of use. These factors reduce the need for either resharpening, or worst, replacing the drill. The cost of cobalt bits are what scares people away, but if you're gonna be using it more than 2 or 3 times, its worth the upgrade from black oxide or a coated bit, thus giving it great value for money. The "M42" is a reference for the amount of cobalt used in the "material makeup" of the bit, with 8% cobalt being used in M42, and 5% cobalt in M35. Both are great options, but i recommend getting an M42 version when possible. The use of cobalt doesnt change the size or shape of the drill, although some will have different flute counts and designs, some tips have a "no pilot hole" start and some will have different degrees of an angle at the head to help with different types of material. Overall, storage capacity will not change unless you opt for different lengths, such as mechanics and aviation length. To sum this up, this is a great drill that should last a long time if used correctly. Bosch is very prevalent in my drill cabinet, so dont be afraid to spend a little extra and get the good one!

## Frequently Bought Together

- BOSCH CO14B 14-Piece Assorted Set with Included Case - Cobalt M42 Metal Drill Bits with Three-Flat Shank for Drilling Applications in Stainless Steel, Cast Iron, Titanium, and Light-Gauge Metal
- Tap Magic 30004P ProTap Cutting Fluid, 4 oz. Size
- Lubri-Cut Cutting Paste for Drilling Metal - 2 Oz Tub - Made in USA | Beeswax Oil for Metal | High Performance Tapping & Cutting Wax | Saw Blade Lubricant & Drill Fluid

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*Product available on Desertcart Tunisia*
*Store origin: TN*
*Last updated: 2026-07-09*