---
product_id: 528696555
title: "21Pcs Cobalt Drill Bits Set, M35 HSS, 135 Degree Tip, Twist Jobber Length Drill Bit for Hardened Metal, Cast Iron, Stainless Steel, Plastic and Wood with Metal Indexed Storage Case 1/16\"-3/8\""
brand: "gmtools"
price: "฿3799"
currency: THB
in_stock: true
reviews_count: 8
category: "Gmtools"
url: https://www.desertcart.co.th/products/528696555-21pcs-cobalt-drill-bits-set-m35-hss-135-degree-tip
store_origin: TH
region: Thailand
---

# 135° Split Point for precise, fast penetration M35 Cobalt Alloy for extreme durability Metal indexed case for organized storage 21Pcs Cobalt Drill Bits Set, M35 HSS, 135 Degree Tip, Twist Jobber Length Drill Bit for Hardened Metal, Cast Iron, Stainless Steel, Plastic and Wood with Metal Indexed Storage Case 1/16"-3/8"

**Brand:** gmtools
**Price:** ฿3799
**Availability:** ✅ In Stock

## Summary

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

## Quick Answers

- **What is this?** 21Pcs Cobalt Drill Bits Set, M35 HSS, 135 Degree Tip, Twist Jobber Length Drill Bit for Hardened Metal, Cast Iron, Stainless Steel, Plastic and Wood with Metal Indexed Storage Case 1/16"-3/8" by gmtools
- **How much does it cost?** ฿3799 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/528696555-21pcs-cobalt-drill-bits-set-m35-hss-135-degree-tip)

## Best For

- gmtools enthusiasts

## Why This Product

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

## Key Features

- • **Organized & Portable:** Durable metal indexed case keeps your bits secure, accessible, and ready for any job.
- • **Unmatched Durability:** 5% Cobalt-infused M35 steel resists wear and heat for long-lasting performance.
- • **Versatile Size Range:** 21-piece set covers 1/16" to 3/8" for every project, from metal to wood and plastic.
- • **Precision Cutting Edge:** 135° split point design ensures quick, centered drilling with minimal walking.
- • **Effortless Chip Removal:** Twist jobber length flutes clear debris fast, keeping your workflow smooth and efficient.

## Overview

This 21-piece GMTOOLS drill bit set features industrial-grade M35 high-speed cobalt steel with 5% cobalt for superior wear resistance. The 135° split point tip ensures fast, precise drilling with reduced walking, while the twist jobber length design efficiently clears chips. Sized from 1/16" to 3/8", it’s perfect for hardened metals, cast iron, stainless steel, plastic, and wood. All bits come neatly organized in a robust metal indexed storage case, making it the ultimate toolkit upgrade for professionals and DIY enthusiasts alike.

## Description

Product description

Review: decent product so far - working well for the few things I've used them for so far. cut quickly and cleanly. nice metal box to keep them in and organized as well.
Review: Nice, inexpensive set of bits - Nice, inexpensive set of drill bits. They're not very long, so make sure you know what you're getting. They're nice to have as replacements for others that I have broken so they fit my need perfectly. I'm not expecting to drill through diamonds with them...

## Features

- Perfect Drill Bits: Precision grinding process for a clean surface and high grinding accuracy. Universal round drill shank, widely applicable of tool holding systems and tightly clamped
- 135° Split Point & Twist Design: The 135 degree fast cutting point is automatically centered and penetrates quickly with less pressure, reducing walking, fully ground drill bit with sharp and durable cutting edge. Twist design for clear chips faster
- Enhanced M35 Alloy Material: These drill bits contain 5% Cobalt alloy steel, which increases wear resistance and durability. Industry grade M35 high speed steel drill bit set.
- Set Includes: 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, 23/64 and 3/8 inch bits; Comes in metal indexed storage case for easy storage
- QUALITY COMMITMENT: If for any reason you are not satisfied with your purchase, please contact us. We provide 30-day money back. 100% Satisfaction Guarantee for risk-free shopping!

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0BWXGCJTM |
| Best Sellers Rank | #5,035 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #11 in Jobber Drill Bits |
| Brand | GMTOOLS |
| Brand Name | GMTOOLS |
| Customer Reviews | 4.4 out of 5 stars 2,435 Reviews |
| Cutting Angle String | 135 Degrees |
| Cutting Diameter | 0.38 Inches |
| Finish Type | Titanium |
| Finish Types | Titanium |
| Included Components | drill bit |
| Manufacturer | GMTOOLS |
| Material | Cobalt Steel |
| Material Type | Cobalt Steel |
| Minimum Bore Diameter | 0.06 Inches |
| Number of Flutes | 2 |
| Point Style | Split Point |
| Shank Type | Round |
| Surface Recommendation | Metal |
| Tool Flute Type | Spiral |
| Unit Count | 1.0 Count |

## Product Details

- **Cutting Angle String:** 135 Degrees
- **Cutting Diameter:** 0.38 Inches
- **Finish Type:** Titanium
- **Material:** Cobalt Steel
- **Shank Type:** Round

## Images

![21Pcs Cobalt Drill Bits Set, M35 HSS, 135 Degree Tip, Twist Jobber Length Drill Bit for Hardened Metal, Cast Iron, Stainless Steel, Plastic and Wood with Metal Indexed Storage Case 1/16"-3/8" - Image 1](https://m.media-amazon.com/images/I/71aH9wLDfbL.jpg)
![21Pcs Cobalt Drill Bits Set, M35 HSS, 135 Degree Tip, Twist Jobber Length Drill Bit for Hardened Metal, Cast Iron, Stainless Steel, Plastic and Wood with Metal Indexed Storage Case 1/16"-3/8" - Image 2](https://m.media-amazon.com/images/I/51mtrHc4gdL.jpg)
![21Pcs Cobalt Drill Bits Set, M35 HSS, 135 Degree Tip, Twist Jobber Length Drill Bit for Hardened Metal, Cast Iron, Stainless Steel, Plastic and Wood with Metal Indexed Storage Case 1/16"-3/8" - Image 3](https://m.media-amazon.com/images/I/81a2ndngy2L.jpg)
![21Pcs Cobalt Drill Bits Set, M35 HSS, 135 Degree Tip, Twist Jobber Length Drill Bit for Hardened Metal, Cast Iron, Stainless Steel, Plastic and Wood with Metal Indexed Storage Case 1/16"-3/8" - Image 4](https://m.media-amazon.com/images/I/71bRx-xIFNL.jpg)
![21Pcs Cobalt Drill Bits Set, M35 HSS, 135 Degree Tip, Twist Jobber Length Drill Bit for Hardened Metal, Cast Iron, Stainless Steel, Plastic and Wood with Metal Indexed Storage Case 1/16"-3/8" - Image 5](https://m.media-amazon.com/images/I/814635tf9+L.jpg)

## Available Options

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

## Customer Reviews

### ⭐⭐⭐⭐⭐ decent product so far
*by L***E on February 4, 2026*

working well for the few things I've used them for so far. cut quickly and cleanly. nice metal box to keep them in and organized as well.

### ⭐⭐⭐⭐⭐ Nice, inexpensive set of bits
*by T***Y on February 3, 2026*

Nice, inexpensive set of drill bits. They're not very long, so make sure you know what you're getting. They're nice to have as replacements for others that I have broken so they fit my need perfectly. I'm not expecting to drill through diamonds with them...

### ⭐⭐⭐⭐ Good bits, poor quality box.
*by A***R on June 2, 2025*

Bit’s are sharp and appear to hold an edge; I have only used two Bits out of the index and both worked well. Index box is thin and deforms easily, latch is not trustworthy. Good bits, poor quality box.

## Frequently Bought Together

- GMTOOLS 21Pcs Cobalt Drill Bits Set, M35 HSS, 135 Degree Tip, Twist Jobber Length Drill Bit for Hardened Metal, Cast Iron, Stainless Steel, Plastic and Wood with Metal Indexed Storage Case 1/16"-3/8"
- amoolo 3/8" Cobalt Drill Bit(5Pcs), M35 HSS Metal Drill Bit Set for Hard Metal, Stainless Steel, Cast Iron
- BECOLLO 1/8 Inch Cobalt Drill Bit Set, M35 Jobber Length Twist Drill Bits,Suitable for Drilling in Hard Metal, Stainless Steel, Cast Iron,20 Pieces

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*Product available on Desertcart Thailand*
*Store origin: TH*
*Last updated: 2026-04-23*