---
product_id: 151201523
title: "Rennie Tools - 10pc 4.2mm HSS Gold Cobalt Jobber Drill Bit Set for Stainless Steel, Hard Metals, Aluminium, Cast Iron, Copper"
brand: "rennie tool company"
price: "$35.55"
currency: USD
in_stock: true
reviews_count: 8
url: https://www.desertcart.us/products/151201523-rennie-tools-10pc-4-2mm-hss-gold-cobalt-jobber-drill
store_origin: US
region: United States of America
---

# 2-flute design - fast chip removal 135° split point - no pre-drill needed M35 HSS with 5% Cobalt - ultimate hardness Rennie Tools - 10pc 4.2mm HSS Gold Cobalt Jobber Drill Bit Set for Stainless Steel, Hard Metals, Aluminium, Cast Iron, Copper

**Brand:** rennie tool company
**Price:** $35.55
**Availability:** ✅ In Stock

## Summary

> 🔩 Drill Like a Pro, Shine Like Gold!

## Quick Answers

- **What is this?** Rennie Tools - 10pc 4.2mm HSS Gold Cobalt Jobber Drill Bit Set for Stainless Steel, Hard Metals, Aluminium, Cast Iron, Copper by rennie tool company
- **How much does it cost?** $35.55 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/151201523-rennie-tools-10pc-4-2mm-hss-gold-cobalt-jobber-drill)

## Best For

- rennie tool company enthusiasts

## Why This Product

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

## Key Features

- • **Unmatched Durability:** Crafted from premium M35 HSS with 5% cobalt for superior heat resistance and longevity.
- • **Precision Engineering:** Manufactured to DIN338 standards ensuring exact dimensions and flawless fit every time.
- • **Effortless Penetration:** 135° split point design eliminates walking and pre-drilling, speeding up your workflow.
- • **Versatile Compatibility:** Perfect for stainless steel, hardened metals, aluminium, and even plastics—ideal for pros and DIYers alike.
- • **Optimized Cutting Efficiency:** 2-flute geometry accelerates chip evacuation for smoother, faster drilling.

## Overview

The Rennie Tools 10pc 4.2mm HSS Gold Cobalt Jobber Drill Bit Set delivers professional-grade performance with M35 alloyed steel containing 5% cobalt for exceptional hardness and heat resistance. Engineered to DIN338 specs with a 135° split point for precise, walk-free drilling and a 2-flute design for rapid chip removal, this set excels on stainless steel, hard metals, aluminium, and more. Packaged in a sleek case, it’s the ultimate upgrade for managers and makers who demand efficiency and durability.

## Description

Rennie Tools - 10pc 4.2mm HSS Gold Cobalt Jobber Drill Bit Set for Stainless Steel, Hard Metals, Aluminium, Cast Iron, Copper

## Features

- For drilling particularly tough or hard metal drilling applications such as stainless steel, hardened metal, cast iron, Cr-Ni and special acid resistant steels. Also work very well on standard metals / steels, RSG, aluminium, high temperature alloy, titanium alloy, non ferrous metals, plastics and wood.
- All our cobalt drill bits are manufactured from high grade M35 alloyed HSS steel with 5% Cobalt content and are fully ground from solid material.
- This cobalt drill bit set is manufactured to DIN338 specifications and they are dimensionally precise. These HSSCO HSS drill bits can be used in pillar drills, handheld electric drills, battery powered drills etc and can also be used in CNC machines
- 135° split point from 3mm and above eradicates the need to pre-drill or centre punch. Prevents walking and enables faster penetration.
- Our high-quality M35 HSS drill bits for metal offer exceptional hardness, heat resistance, and durability. Our 2 flute design is optimised for fast chip removal and smooth cutting. This pack of 10 cobalt jobber drills are supplied in a plastic storage case. These are ideal for professionals, DIY enthusiasts and home improvement enthusiasts

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Manufacturer | Rennie Tool Company |
| Part number | BOX10COBJOBBER |
| Item Weight | 70 g |
| Package Dimensions | 10.4 x 6.2 x 1 cm; 70 g |
| Manufacturer reference | BOX10COBJOBBER |
| Size | 4.2mm x 75mm Cobalt Jobber Drills |
| Colour | Gold |
| Finish | Gold,Hss,Stainless Steel |
| Material | Cobalt |
| Item Package Quantity | 1 |
| Number of Pieces | 10 |
| Batteries included? | No |
| Batteries Required? | No |

## Product Details

- **Material:** Cobalt
- **Cutting diameter:** 4.2 Millimetres
- **Finish type:** Gold,Hss,Stainless Steel
- **Shank type:** Straight
- **Cutting angle string:** 135 Degrees

## Images

![Rennie Tools - 10pc 4.2mm HSS Gold Cobalt Jobber Drill Bit Set for Stainless Steel, Hard Metals, Aluminium, Cast Iron, Copper - Image 1](https://m.media-amazon.com/images/I/71Q2NQtSiGL.jpg)

## Available Options

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

## Customer Reviews

### ⭐⭐⭐⭐⭐ The very best drills out there
*by A***R on 26 January 2025*

Needed to drill out hardened steel studs from a cylinder head , tried an apparently good brand , all failed , but, these are super sharp and super hard , proper cobalt strength, drilled through a hardened m10 bolt head and a spanner no trouble at all no coolant needed, best I've ever used. All ten arrived perfect condition in a nice slide out tray, I will always get these from now on .

### ⭐⭐⭐⭐⭐ This is the drill you need.
*by R***W on 26 March 2025*

What can I say, the drill is sharp and can drill through most metal sheets like butter. I used for a 3mm steel bracket which I struggle to drill with my previous drills and it ripped through it in no time.

### ⭐⭐⭐⭐ Seem decent enough
*by A***A on 2 April 2024*

Good price and fast delivery … time will tell how good they are

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**Shop now:** [https://www.desertcart.us/products/151201523-rennie-tools-10pc-4-2mm-hss-gold-cobalt-jobber-drill](https://www.desertcart.us/products/151201523-rennie-tools-10pc-4-2mm-hss-gold-cobalt-jobber-drill)

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*Product available on Desertcart United States of America*
*Store origin: US*
*Last updated: 2026-02-19*