---
product_id: 90092095
title: "Rennie Tools - Box of 10 x 4mm HSS Gold Cobalt Jobber Drill Bit Set For Stainless Steel, Hard Metals, Aluminium, Cast Iron, Copper. Twist Drill Bit Sets Supplied In A Box. 4mm Drill Bit Set"
brand: "rennie tool company"
price: "¥4829"
currency: JPY
in_stock: true
url: https://www.desertcart.jp/products/90092095-rennie-tools-box-of-10-x-4mm-hss-gold-cobalt
store_origin: JP
region: Japan
---

# 135° split point - no pre-drill needed, faster penetration M35 HSS with 5% Cobalt - supreme hardness 2-flute design - rapid chip removal & smooth cutting Rennie Tools - Box of 10 x 4mm HSS Gold Cobalt Jobber Drill Bit Set For Stainless Steel, Hard Metals, Aluminium, Cast Iron, Copper. Twist Drill Bit Sets Supplied In A Box. 4mm Drill Bit Set

**Brand:** rennie tool company
**Price:** ¥4829
**Availability:** ✅ In Stock

## Summary

> ⚡ Drill Like a Pro, Finish Like a Boss!

## Quick Answers

- **What is this?** Rennie Tools - Box of 10 x 4mm HSS Gold Cobalt Jobber Drill Bit Set For Stainless Steel, Hard Metals, Aluminium, Cast Iron, Copper. Twist Drill Bit Sets Supplied In A Box. 4mm Drill Bit Set by rennie tool company
- **How much does it cost?** ¥4829 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/90092095-rennie-tools-box-of-10-x-4mm-hss-gold-cobalt)

## 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

- • **Organized & Ready:** Set of 10 gold-finished 4mm jobber drill bits neatly packed in a durable plastic case for easy storage and transport.
- • **Effortless Drilling:** 135° split point design eliminates walking and pre-drilling, accelerating your workflow.
- • **Unmatched Durability:** Crafted from premium M35 alloyed HSS with 5% cobalt for extreme hardness and heat resistance.
- • **Precision Engineering:** Manufactured to DIN338 standards ensuring exact dimensions and flawless fit for professional use.
- • **Versatile Performance:** Perfect for stainless steel, hardened metals, aluminium, titanium alloys, plastics, and wood.

## Overview

The Rennie Tools 4mm HSS Gold Cobalt Jobber Drill Bit Set features 10 precision-engineered bits made from high-grade M35 alloy steel with 5% cobalt, designed for tough metals including stainless steel and titanium alloys. With a 135° split point for faster, more accurate drilling and a 2-flute design for efficient chip removal, this set is ideal for professionals and serious DIYers seeking durability, precision, and versatility in one sleek gold-finished package.

## Description

Rennie Tools - Box of 10 x 4mm HSS Gold Cobalt Jobber Drill Bit Set For Stainless Steel, Hard Metals, Aluminium, Cast Iron, Copper. Twist Drill Bit Sets Supplied In A Box. 4mm Drill Bit Set

## 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 | 60 g |
| Package Dimensions | 10.3 x 6.2 x 0.9 cm; 60 g |
| Item model number | Rennie-HSS-CO-4mm-135SP |
| Size | 4mm x 75mm Cobalt Jobber Drills |
| Colour | Gold |
| Finish | Gold,Hss,Stainless Steel |
| Material | Alloy Steel, Stainless Steel |
| Number of Pieces | 10 |
| Batteries included? | No |
| Batteries Required? | No |

## Product Details

- **Material:** Alloy Steel, Stainless Steel
- **Cutting diameter:** 4 Millimetres
- **Finish type:** Gold,Hss,Stainless Steel
- **Shank type:** Straight
- **Cutting angle string:** 135 Degrees

## Images

![Rennie Tools - Box of 10 x 4mm HSS Gold Cobalt Jobber Drill Bit Set For Stainless Steel, Hard Metals, Aluminium, Cast Iron, Copper. Twist Drill Bit Sets Supplied In A Box. 4mm Drill Bit Set - Image 1](https://m.media-amazon.com/images/I/71Q2NQtSiGL.jpg)

## Available Options

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

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*Product available on Desertcart Japan*
*Store origin: JP*
*Last updated: 2026-01-25*