---
product_id: 375557765
title: "INTOO Hss Cobalt Drill Bits Set 21PCS Triangle Shank,Industry Drill bits with Golden Ratio Tip,"
brand: "intoo"
price: "KD 23.31"
currency: KWD
in_stock: true
reviews_count: 8
url: https://www.desertcart.com.kw/products/375557765-intoo-hss-cobalt-drill-bits-set-21pcs-triangle-shank-industry
store_origin: KW
region: Kuwait
---

# Golden Ratio tip for 3x longer life 21 precision sizes 1/16"–3/8" 5% cobalt for max durability INTOO Hss Cobalt Drill Bits Set 21PCS Triangle Shank,Industry Drill bits with Golden Ratio Tip,

**Brand:** intoo
**Price:** KD 23.31
**Availability:** ✅ In Stock

## Summary

> 🔩 Drill Smarter, Last Longer – The Ultimate Cobalt Edge!

## Quick Answers

- **What is this?** INTOO Hss Cobalt Drill Bits Set 21PCS Triangle Shank,Industry Drill bits with Golden Ratio Tip, by intoo
- **How much does it cost?** KD 23.31 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.com.kw](https://www.desertcart.com.kw/products/375557765-intoo-hss-cobalt-drill-bits-set-21pcs-triangle-shank-industry)

## Best For

- intoo enthusiasts

## Why This Product

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

## Key Features

- • **Built to Endure:** 5% cobalt alloy boosts wear resistance, perfect for stainless steel and hard metals.
- • **Organized & Ready:** Durable metal storage box keeps your bits protected and instantly accessible.
- • **Ergonomic Triangle Shank:** Secure grip and reduced slippage for professional-grade control and efficiency.
- • **Precision in Every Drill:** 21 meticulously sized bits from 1/16" to 3/8" cover all your project needs with exactness.
- • **Golden Ratio Tip Technology:** Patented tip design ensures ultra-clean holes and triples bit lifespan on tough metals.

## Overview

The INTOO 21PCS Cobalt Drill Bits Set features a comprehensive range of sizes with a patented Golden Ratio tip for superior durability and precision. Crafted from 5% cobalt high-speed steel, these bits excel in drilling stainless steel and hard metals, offering up to three times longer life. The ergonomic triangle shank ensures stability, while the sturdy metal storage box keeps your tools organized and ready for any heavy-duty project.

## Description

Full description not available

## Features

- SPECIFICATIONS:21PCS COBALT DRILL BIT SET： 1/16,5/64,3/32,7/64,1/8,9/64,5/32,11/64,3/16,13/64,7/32,15/64,1/4,17/64,9/32,19/64,5/16,21/64,11/32,32/64,3/8.Sizes from 1/8 to 3/8 with triangle shank.
- GOLDEN RATIO TIP:From size 5/32" with patented "Golden Ratio" Tip,which especially designed for heavy duty purpose, effect clean&smooth holes on hard metal like stainless steel,and moreover, at least 3 times longer life.
- COBALT 5% MATERIAL:suitable for stainless steel or any hard metal,significantly increases the ware-resistance and durability.
- STORAGE BOX:strong metal box.
- HOW TO USE:controlling the drilling speed by lowest RPM would make drill life much longer than 3 times.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Material | Cobalt, High Speed Steel (HSS), Stainless Steel |
| Cutting Diameter | 0.38 Inches |
| Finish Type | Amber finish |
| Shank Type | Triangle |
| Cutting Angle String | 135 Degrees |
| Brand | INTOO |
| Tool Flute Type | Straight |
| Point Style | Split Point |
| Surface Recommendation | Stainless Steel and Hard Metals |
| Number of Flutes | 2 |
| UPC | 791265838650 |
| Set Name | 21PCS Cobalt Drill Bits Set |
| Unit Count | 1 Count |
| Manufacturer | Linrui Tools |
| Number of Pieces | 21 |
| Part Number | CO21 |
| Item Weight | 1 pounds |
| Package Dimensions | 6.5 x 4.5 x 1.7 inches |
| Item model number | CO21 |
| Style | M35-21PCS |
| Finish | Amber finish |
| Pattern | Unique Patented Tip Design with Varying Sizes |
| Batteries Included? | No |
| Batteries Required? | No |

## Product Details

- **Material:** Cobalt, High Speed Steel (HSS), Stainless Steel
- **Cutting Diameter:** 0.38 Inches
- **Finish Type:** Amber finish
- **Shank Type:** Triangle
- **Cutting Angle String:** 135 Degrees

## Images

![INTOO Hss Cobalt Drill Bits Set 21PCS Triangle Shank,Industry Drill bits with Golden Ratio Tip, - Image 1](https://m.media-amazon.com/images/I/71tgIXiD9zL.jpg)
![INTOO Hss Cobalt Drill Bits Set 21PCS Triangle Shank,Industry Drill bits with Golden Ratio Tip, - Image 2](https://m.media-amazon.com/images/I/616eJnP4ILL.jpg)
![INTOO Hss Cobalt Drill Bits Set 21PCS Triangle Shank,Industry Drill bits with Golden Ratio Tip, - Image 3](https://m.media-amazon.com/images/I/61C+GIrSKVL.jpg)
![INTOO Hss Cobalt Drill Bits Set 21PCS Triangle Shank,Industry Drill bits with Golden Ratio Tip, - Image 4](https://m.media-amazon.com/images/I/6118jHjFm0L.jpg)
![INTOO Hss Cobalt Drill Bits Set 21PCS Triangle Shank,Industry Drill bits with Golden Ratio Tip, - Image 5](https://m.media-amazon.com/images/I/51zAxY4bFLL.jpg)

## Available Options

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

## Questions & Answers

**Q: Thank you for answering my first question. you said, "we takes the highest grade of the first one", do you mean highest grade of tin?**
A: Not only Tin, but also thickness of the Tin.

**Q: Where are they manufactured?**
A: Made in PRC

**Q: How do these do drilling through 1/4 steel?**
A: They do fine if you use cutting oil. If you try to drill it dry the bits will just spin and wear out.

**Q: What kind of titanium coating is on these? titanium nitride (tin), titanium carbonitride (ticn), titanium aluminum nitride (tiain)? thanks**
A: We use the first type（TIN）, but we takes the highest grade of the first one in terms of thickness, abrasion resistance and finish.

## Customer Reviews

### ⭐⭐⭐⭐⭐ 5.0 out of 5 stars







  
  
    No complaints from my husband!!!
  

*by A***R on Reviewed in the United States on November 23, 2023*

Bought this as a surprise gift for my husband. He absolutely loves it and hasn’t complained about it so far!

### ⭐⭐⭐⭐⭐ 5.0 out of 5 stars







  
  
    Drill bits
  

*by L***. on Reviewed in the United States on November 5, 2023*

Drill bits are great and sharp work extremely well

### ⭐⭐⭐⭐ 4.0 out of 5 stars







  
  
    Metal case came dented with minor damage
  

*by D***S on Reviewed in the United States on January 8, 2023*

Drill bits work pretty good. The case came all beat to hell. Opens fine but a pain to close.

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*Product available on Desertcart Kuwait*
*Store origin: KW*
*Last updated: 2026-03-04*