---
product_id: 139056833
title: "40-Pc M35 Cobalt Twist Drill Bit Set 3/64 to 3/32 for Hard Metal | Fully Ground 5% HSS-CO With 118° Point; 65-67 HRC Superior Heat Resistance; Straight Shank; Cuts Cast Iron, Plastics & Wood"
brand: "hymnorq"
price: "฿1567"
currency: THB
in_stock: true
reviews_count: 13
category: "Hymnorq"
url: https://www.desertcart.co.th/products/139056833-40-pc-m35-cobalt-twist-drill-bit-set-3-64
store_origin: TH
region: Thailand
---

# 5% cobalt heat resistance 40-piece precision assortment 65-67 HRC Rockwell Hardness 40-Pc M35 Cobalt Twist Drill Bit Set 3/64 to 3/32 for Hard Metal | Fully Ground 5% HSS-CO With 118° Point; 65-67 HRC Superior Heat Resistance; Straight Shank; Cuts Cast Iron, Plastics & Wood

**Brand:** hymnorq
**Price:** ฿1567
**Availability:** ✅ In Stock

## Summary

> 🔧 Drill Like a Pro, Last Like a Legend

## Quick Answers

- **What is this?** 40-Pc M35 Cobalt Twist Drill Bit Set 3/64 to 3/32 for Hard Metal | Fully Ground 5% HSS-CO With 118° Point; 65-67 HRC Superior Heat Resistance; Straight Shank; Cuts Cast Iron, Plastics & Wood by hymnorq
- **How much does it cost?** ฿1567 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/139056833-40-pc-m35-cobalt-twist-drill-bit-set-3-64)

## Best For

- hymnorq enthusiasts

## Why This Product

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

## Key Features

- • **Versatile & Reliable Fit:** Straight shank with abrasion-resistant bronze finish fits standard chucks—perfect for metal, plastics, wood, and more.
- • **Optimal 118° Chisel Point:** Balanced cutting speed and tip strength for stability and longevity across materials and tools.
- • **Always Ready with 40 Precision Bits:** Four essential fractional sizes, 10 bits each—never pause your project due to a broken drill bit again.
- • **Unmatched Durability & Heat Resistance:** Premium M35 cobalt steel with 65-67 HRC keeps you drilling through the toughest metals without burnout.
- • **Precision Engineered for Flawless Performance:** Fully ground from solid steel with dual-flute geometry for rapid chip ejection and smooth drilling.

## Overview

The Hymnorq 40-Pc M35 Cobalt Twist Drill Bit Set features premium 5% cobalt high-speed steel with a Rockwell hardness of 65-67 HRC, ensuring superior heat resistance and durability. This fully ground, precision-balanced set includes 40 bits across four popular fractional sizes, each with a 118° chisel point and abrasion-resistant bronze finish. Designed for professional-grade drilling in hard metals, plastics, and wood, it guarantees consistent performance and longevity for demanding projects.

## Description

Hymnorq 40-Pc M35 Cobalt Twist Drill Bit Set 3/64 to 3/32 for Hard Metal | Fully Ground 5% HSS-CO With 118° Point; 65-67 HRC Superior Heat Resistance; Straight Shank; Cuts Cast Iron, Plastics & Wood - desertcart.com

Review: High Quality - High quality-m reasonably priced
Review: So far so good - Bought this set 2 months ago and have only used ONE bit. It worked well.

## Features

- Premium M35 Cobalt Grade: Constructed from High-Speed Steel containing 5% Cobalt (HSS-CO), these bits boast a Rockwell Hardness of 65-67 HRC. This advanced composition offers superior heat resistance and wear durability compared to standard HSS bits, making them essential for drilling through tough metals like stainless steel, high-carbon steel, and cast iron.
- High-Value 40-Piece Assortment: Small drill bits are prone to breaking during precision work. This bulk set includes 40 pieces in the 4 most commonly used fractional sizes: 3/64", 1/16", 5/64", and 3/32" (10 bits per size). You will always have plenty of spares on hand, ensuring your project never stops due to a broken bit.
- Fully Ground & Precision Balance: Unlike roll-forged alternatives, our bits are fully ground from solid material. This manufacturing process guarantees precise dimension accuracy, excellent concentricity, and a smooth dual-flute geometry that ejects chips rapidly to prevent overheating and clogging.
- Durable 118° Chisel Point: Features a classic 118-degree point angle that balances cutting speed with tip strength. This design is ideal for general-purpose drilling and provides better stability and longevity when working with hand drills or on materials where a sharper point might chip.
- Versatile Application: The straight shank design ensures a secure fit in standard drill chucks and collets. Finished with an abrasion-resistant bronze coating, these bits are perfect for DIY repairs, model making, jewelry crafting, and professional maintenance on metal, hard plastics, and wood.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B07RKRKMBX |
| Best Sellers Rank | #112,390 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #247 in Jobber Drill Bits |
| Brand | HYMNORQ |
| Brand Name | HYMNORQ |
| Customer Reviews | 4.4 out of 5 stars 160 Reviews |
| Cutting Angle String | 118 degrees |
| Cutting Diameter | 3/64, 1/16, 5/64, 3/32 inches |
| Finish Type | Bronze |
| Finish Types | Bronze |
| Included Components | 40 pieces of cobalt drill bits |
| Manufacturer | Hymnorq |
| Material | Cobalt Steel |
| Material Type | Cobalt Steel |
| Model | M35 |
| Number of Flutes | 2 |
| Number of Packs | 1 |
| Number of Pieces | 40 |
| Part Number | M35 |
| Point Style | Split Point |
| Set Name | 40pcs inch 4size |
| Shank Type | Straight |
| Surface Recommendation | Stainless Steel |
| Tool Flute Type | Spiral |
| UPC | 681413691339 |
| Unit Count | 1 Count |

## Images

![40-Pc M35 Cobalt Twist Drill Bit Set 3/64 to 3/32 for Hard Metal | Fully Ground 5% HSS-CO With 118° Point; 65-67 HRC Superior Heat Resistance; Straight Shank; Cuts Cast Iron, Plastics & Wood - Image 1](https://m.media-amazon.com/images/I/71IuataF0WL.jpg)

## Available Options

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

## Questions & Answers

**Q: Are most of these reviews fake? 50 real cobalt bits for $15 is impossible.**
A: We swear every review in our store is real. Our living relies on this account. We'll never risk making fake reviews, or it might be closed by Amazon.
Pay attention to the size. These bits are small. The 1mm is like a needle.
You guys paid extra too much for those famous brands before.  Selling it at $15 is profitable for us.

**Q: is the drill bits pure cobalt?**
A: Thanks for your question.
Cobalt drill bits are not made of pure cobalt, but rather a steel alloy with 5 to 8 percent cobalt. The 5-percent alloy is known as M35 grade, and the 8-percent alloy is M42. 
These bits are made of M35 grade cobalt steel, with 5% cobalt added.

**Q: I want to drill 9 to 12 holes through large, stainless steel hinges (3mm thick).Could I do the job with these drills?**
A: Quality of hinge is the variable here. I would buy a single cheap coated drill bit first. If you can drill one hole with the cheap bit, then you should be able to drill 9-12 in the same material with this set. As always use cutting oil and make sure your press is set to proper speed.

**Q: What size is the shank on these?**
A: Size of the shank is the same as the size of the drill.

## Customer Reviews

### ⭐⭐⭐⭐⭐ High Quality
*by R***S on March 12, 2025*

High quality-m reasonably priced

### ⭐⭐⭐⭐⭐ So far so good
*by M***N on September 19, 2025*

Bought this set 2 months ago and have only used ONE bit. It worked well.

### ⭐⭐⭐⭐ Not cheap Chinese junk
*by M***S on February 20, 2021*

Just inexpensive usable Chinese drill bits. They are within .001" of stated sizes and will cut soft copper and mild steel unlike some of the cheaper bits on Amazon. The only reason I didn't give 5 stars is because I haven't used them long enough or hard enough to make that judgement.

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*Product available on Desertcart Thailand*
*Store origin: TH*
*Last updated: 2026-08-23*