---
product_id: 29374403
title: "Countersink Drill Bit Set for Steel, 3 Flute 90 Degree HSS Chamfering Tool Bit for Metal Wood Woodworking Metal Working Tool Bit Set, Pack of 6pcs 1/4 1/2"
brand: "chiloskit"
price: "$52"
currency: NZD
in_stock: true
url: https://www.desertcart.nz/products/29374403-countersink-drill-bit-set-for-steel-3-flute-90-degree
store_origin: NZ
region: New Zealand
---

# HSS 4231 heat & corrosion resistant One-piece design for chip-free efficiency 90° precision chamfering Countersink Drill Bit Set for Steel, 3 Flute 90 Degree HSS Chamfering Tool Bit for Metal Wood Woodworking Metal Working Tool Bit Set, Pack of 6pcs 1/4 1/2

**Brand:** chiloskit
**Price:** $52
**Availability:** ✅ In Stock

## Summary

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

## Quick Answers

- **What is this?** Countersink Drill Bit Set for Steel, 3 Flute 90 Degree HSS Chamfering Tool Bit for Metal Wood Woodworking Metal Working Tool Bit Set, Pack of 6pcs 1/4 1/2 by chiloskit
- **How much does it cost?** $52 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.nz](https://www.desertcart.nz/products/29374403-countersink-drill-bit-set-for-steel-3-flute-90-degree)

## Best For

- chiloskit enthusiasts

## Why This Product

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

## Key Features

- • **Built to Last:** Crafted from premium HSS 4231 for superior heat, rust, and corrosion resistance.
- • **Work Without Pause:** One-piece bit design prevents clogging, boosting your workflow speed.
- • **Precision Perfected:** 90° three-flute design ensures flawless chamfering on steel and wood.
- • **Versatile Size Range:** Six essential sizes from 1/4" to 1/2" cover all your metal and woodworking needs.
- • **Effortless Chamfering:** Automatic through-hole cutting trims both sides in seconds—no hand drill needed.

## Overview

This 6-piece countersink drill bit set features 90° three-flute HSS 4231 bits designed for efficient, clog-free chamfering on metals and wood. Ideal for workpieces under 45HRC, it offers heat and corrosion resistance with six versatile sizes, delivering professional-grade precision and durability for your DIY or metalworking projects.

## Description

Full description not available

## Features

- [Wide application]: This counter sink bit Suitable for workpieces with hardness less than 45HRC, such as carbon steel, aluminum plate, carbon steel, thin iron plate, insulating plate, PVC plate, wood board, etc.(Not Great for Stainless Steel）
- [Efficiency]: this wood metal drilling bit has a one-piece design, which makes the chips generated during the chamfering process more convenient, and will not delay work efficiency due to tool blockage.
- [HSS 4231]: each metal countersunk drill bit is made from high quality HSS material, Chiloskit countersink drill bit set is excellent in heat, corrosion and rust resistance.
- [Ease of use]: The automatic through-hole chamfering cutter can quickly trim and chamfer both sides of the hole in a few seconds.including 6 most popular sizes: : 6.3mm(1/4''), 8.3mm(5/16''), 10.4mm(2/5''), 12.4mm(1/2''), 16.5mm(5/8''), 20.5mm(4/5'').Shank: round shank.Not recommended to use hand drills.
- Great gift for man DIYer . Don't settle for less - choose our countersink drill bit set for a superior drilling experience.If you are not satisfied withthe functions or any other reasons, just return it to us and we’ll be happy to resolve any problems

## Product Details

- **Material:** High Speed Steel (HSS)
- **Cutting Diameter:** 6.3 Millimeters
- **Finish Type:** Silver
- **Shank Type:** Round
- **Cutting Angle String:** 90 Degrees

## Images

![Countersink Drill Bit Set for Steel, 3 Flute 90 Degree HSS Chamfering Tool Bit for Metal Wood Woodworking Metal Working Tool Bit Set, Pack of 6pcs 1/4 1/2 - Image 1](https://m.media-amazon.com/images/I/61Qhhef1ypL.jpg)

## Questions & Answers

**Q: What are the shank diameters?**
A: Dear  friend
Head Diameter *Shank Diameter * Length 
                  6.3MM: 6.3MM*5MM*37MM 
                  8.3MM: 8.3MM*6MM*40MM 
                   10.4MM:10.4MM*6MM*39MM 
                 12.4MM:12.4MM*10MM*46MM 
                  16.5MM:16.5MM*10MM*47MM 

Any question ,just feel free to tell us 
Regards
Preamer

**Q: do these come only in metric or is imperial available as well?**
A: metric

**Q: How do these perform on stainless steel to deburr holes?**
A: They work good in a2,d2, and stainless 304. I have several types, 60, 82, and 90 deg. I don't run a high rpm though. I use these in a hand drill motor and in my mill. Remember start slow, multi blade with light chip depth will give a good finish. They're though enough to champher an edge also, at least occasionally!

**Q: What is the correct speed to avoid the chattering that leaves a very poor finish in the countersink?**
A: Try running them at a higher speed and make sure EVERYTHING is as solidly locked down as possible. good luck

## Frequently Bought Together

- Countersink Drill Bit Set for Steel, 3 Flute 90 Degree HSS Chamfering Tool Bit for Metal Wood Woodworking Metal Working Tool Bit Set, Pack of 6pcs 1/4 1/2
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*Product available on Desertcart New Zealand*
*Store origin: NZ*
*Last updated: 2026-02-11*