---
product_id: 448555665
title: "WildBossy Cobalt Drill Bit Set 4.5mm - 10pcs, M35 Twist Drill Bits Straight Shank, 4.5mm High Speed Steel Drill Bits for Drilling in Hard Metal, Stainless Steel, Cast Iron"
brand: "wildbossy"
price: "฿1893"
currency: THB
in_stock: true
reviews_count: 5
category: "Wild Bossy"
url: https://www.desertcart.co.th/products/448555665-wildbossy-cobalt-drill-bit-set-4-5mm-10pcs-m35-twist
store_origin: TH
region: Thailand
---

# 135° Split Point for Precision Drilling M35 Cobalt Steel Alloy - 67 Rockwell Hardness 10-Piece Set in Durable Storage Case WildBossy Cobalt Drill Bit Set 4.5mm - 10pcs, M35 Twist Drill Bits Straight Shank, 4.5mm High Speed Steel Drill Bits for Drilling in Hard Metal, Stainless Steel, Cast Iron

**Brand:** wildbossy
**Price:** ฿1893
**Availability:** ✅ In Stock

## Summary

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

## Quick Answers

- **What is this?** WildBossy Cobalt Drill Bit Set 4.5mm - 10pcs, M35 Twist Drill Bits Straight Shank, 4.5mm High Speed Steel Drill Bits for Drilling in Hard Metal, Stainless Steel, Cast Iron by wildbossy
- **How much does it cost?** ฿1893 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.co.th](https://www.desertcart.co.th/products/448555665-wildbossy-cobalt-drill-bit-set-4-5mm-10pcs-m35-twist)

## Best For

- wildbossy enthusiasts

## Why This Product

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

## Key Features

- • **Confidence Backed:** WildBossy guarantees satisfaction with responsive customer support.
- • **Organized On-the-Go:** Compact 10-piece set housed in a rugged case for seamless transport.
- • **Precision Every Time:** 135° split point and gold oxide finish prevent walking and ensure clean cuts.
- • **Unmatched Durability:** M35 cobalt steel with molybdenum boosts lifespan 17x over standard bits.
- • **Versatile Powerhouse:** Effortlessly drills stainless steel, cast iron, aluminum, and more.

## Overview

The WildBossy Cobalt Drill Bit Set features 10 precision-engineered 4.5mm M35 cobalt steel bits with a 135° split point and gold oxide finish, delivering exceptional hardness (up to 67 Rockwell) and durability. Designed for professional-grade drilling in hard metals like stainless steel and cast iron, this set combines longevity, precision, and portability in a sturdy storage case—perfect for demanding projects and on-site use.

## Description

Buy WildBossy Cobalt Drill Bit Set 4.5mm - 10pcs, M35 Twist Drill Bits Straight Shank, 4.5mm High Speed Steel Drill Bits for Drilling in Hard Metal, Stainless Steel, Cast Iron online on desertcart.ae at best prices. ✓ Fast and free shipping ✓ free returns ✓ cash on delivery available on eligible purchase.

Review: Solid. - solid drill bits.
Review: Drills through harden steel. - Very good drill bits, drills through harden steel.

## Features

- 5% COBALT TWIST DRILL BITS SET】Made from M35 Cobalt Steel with Molybdenum and Cobalt added to form a hardened alloy, can measure up to 67 Rockwell hardness, cut faster, last longer, and last longer than normal HSS drill bits 17 times.
- 【10PCS METRIC DIRLL BITS SET】The set includes 10pcs of M35 4.5MM cobalt steel twist drill bits. Organized in a sturdy plastic storage case for easy transport to your workplace.
- 【TWIST DESIGN AND PERFORMANCE】Precise 135° SPLIT Point, Gold Oxide Surface and Round Straight Shank. Prevents walking and removes chips and particles faster. Precision fully ground to ensure smooth chip movement.
- 【VERSATILE USE】Our M35 Cobalt High-Speed Steel drill bits are ideal for cutting through hard materials like stainless steel, steel, and cast iron, as well as wood, aluminum alloys, and other metals. Please note that they are not suitable for glass or ceramic materials. Pay attention to speed, pressure, and heat control when drilling.
- 【SATISFACTION GUARANTEED】We stand behind the quality of our product. If you have any problems or are not satisfied with our metric drill bit set, please feel free to contact WildBossy for assistance.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0D458C5SX |
| Best Sellers Rank | #52,815 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #36 in Jobber Drill Bits |
| Brand | WildBossy |
| Brand Name | WildBossy |
| Customer Reviews | 4.5 out of 5 stars 599 Reviews |
| Cutting Angle String | 135 Degrees |
| Cutting angle string | 135 Degrees |
| Finish Types | Gold |
| Finish type | Gold |
| Manufacturer | WildBossy |
| Material | Stainless Steel |
| Material Type | Stainless Steel |
| Shank Type | Straight |
| Shank type | Straight |
| Surface Recommendation | Cer, Metal, Stainless Steel, Wood |
| Surface recommendation | Cer, Metal, Stainless Steel, Wood |

## Product Details

- **Material:** Cobalt Steel
- **Cutting diameter:** 1E+1 Millimeters
- **Finish type:** Hss,Stainless Steel
- **Shank type:** Straight
- **Cutting angle string:** 135 Degrees

## Images

![WildBossy Cobalt Drill Bit Set 4.5mm - 10pcs, M35 Twist Drill Bits Straight Shank, 4.5mm High Speed Steel Drill Bits for Drilling in Hard Metal, Stainless Steel, Cast Iron - Image 1](https://m.media-amazon.com/images/I/611P3nOVYeL.jpg)
![WildBossy Cobalt Drill Bit Set 4.5mm - 10pcs, M35 Twist Drill Bits Straight Shank, 4.5mm High Speed Steel Drill Bits for Drilling in Hard Metal, Stainless Steel, Cast Iron - Image 2](https://m.media-amazon.com/images/I/716R7l4nv6L.jpg)
![WildBossy Cobalt Drill Bit Set 4.5mm - 10pcs, M35 Twist Drill Bits Straight Shank, 4.5mm High Speed Steel Drill Bits for Drilling in Hard Metal, Stainless Steel, Cast Iron - Image 3](https://m.media-amazon.com/images/I/71FllRvJL7L.jpg)
![WildBossy Cobalt Drill Bit Set 4.5mm - 10pcs, M35 Twist Drill Bits Straight Shank, 4.5mm High Speed Steel Drill Bits for Drilling in Hard Metal, Stainless Steel, Cast Iron - Image 4](https://m.media-amazon.com/images/I/71NPSikdThL.jpg)
![WildBossy Cobalt Drill Bit Set 4.5mm - 10pcs, M35 Twist Drill Bits Straight Shank, 4.5mm High Speed Steel Drill Bits for Drilling in Hard Metal, Stainless Steel, Cast Iron - Image 5](https://m.media-amazon.com/images/I/71qpwfnZwDL.jpg)

## Questions & Answers

**Q: I ordered this set but it came as a much cheaper set in a weak, brittle case. Is this what is being sent now, or was this just a shipping mistake?**
A: Mine came in a clear plastic case with a black plastic divider section.   Not the greatest however I needed the bits to work, not the case.

**Q: I want to drill 8 to 10 holes through large, stainless steel hinges (3mm thick).Could I do the job with these drills?**
A: Probably but you will need the right cutting fluid .
I did not use this bits on SS yet.
Thank you
GOOGLE:
"What can you use to cut stainless steel fluid?
As a manufacturer of metal processing oil, we recommend MORESCO BS-6M soluble cutting fluid, MORESCO BS-9 soluble cutting oil. WILL CM-128 semi-synthetic cutting oil, WILL CH-370 semi-synthetic cutting fluid. These cutting oils are especially good on stainless steel, and provide excellent performances during machining."

**Q: Is this suitable for the soft metal in jewelry?**
A: yes, any metal

**Q: Where are they made?**
A: Unfortunately I could not find a country of manufacture this company.   They are inexpensive bits, and I've had good luck with them.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Solid.
*by R***L on 7 December 2025*

solid drill bits.

### ⭐⭐⭐⭐⭐ Drills through harden steel.
*by R***H on 12 April 2025*

Very good drill bits, drills through harden steel.

### ⭐⭐⭐⭐⭐ Realy good quality drill bits
*by K***R on 13 October 2023*

I made my mounting rack for my solar panels out of used steal pipe, and I had to drill quite a few holes for mounting these panels. The piping was quite hard and I bought five drill bits, so as to make sure I wouldn't run out. To my surprise the drill bits held up really well and I was able to drill all the holes with just one bit. I did pre-drill the holes with a center drill, but that was all I used, and of course some lubricant. I never thought that I could drill these many holes without wearing out the drill bit. Quite amazing.

## Frequently Bought Together

- WildBossy M35 5% Cobalt Metric Drill Bits Set (1mm-10mm/19pcs), Straight Shank Jobber Drill Bits, Metal HSS Twist Drill Bits for Stainless Steel Hard Metal and Cast Iron
- Tap Magic 30004P ProTap Cutting Fluid, 4 oz. Size
- MACXCOIP Metric Cobalt Drill Bit Set, 25Pcs M35 HSS Jobber Drill Bits for Hardened Metals, Stainless Steel, Cast Iron and Wooden Plastics, with Metal Index Storage Box, 1mm-13mm

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*Product available on Desertcart Thailand*
*Store origin: TH*
*Last updated: 2026-01-23*