---
product_id: 625642623
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: "KSh16648"
currency: KES
in_stock: true
reviews_count: 5
category: "Gmtools"
url: https://www.desertcart.co.ke/products/625642623-21pcs-cobalt-drill-bits-set-m35-hss-135-degree-tip
store_origin: KE
region: Kenya
---

# 135° Split Point - fast, precise penetration with less walking M35 Cobalt Alloy - 5% Cobalt for extreme durability Metal Indexed Case - organized, portable, and secure 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:** KSh16648
**Availability:** ✅ In Stock

## Summary

> 🔧 Drill Like a Pro, Own Every Project.

## 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?** KSh16648 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.co.ke](https://www.desertcart.co.ke/products/625642623-21pcs-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

- • **Unmatched Durability:** Engineered with premium M35 high-speed steel infused with 5% cobalt for superior wear resistance and longevity.
- • **Versatile Size Range:** 21-piece set covers 1/16" to 3/8" sizes, empowering you to tackle projects from delicate plastics to tough stainless steel.
- • **Precision Cutting Edge:** 135° split point design ensures rapid, centered drilling with minimal effort and zero walking—perfect for hardened metals.
- • **Effortless Chip Removal:** Spiral twist flutes efficiently clear debris, maintaining smooth drilling and preventing overheating during extended use.
- • **Sleek Metal Storage Case:** Robust indexed case keeps your bits impeccably organized and ready to impress on any job site or workshop.

## Overview

The GMTOOLS 21-piece Cobalt Drill Bit Set features M35 high-speed steel with 5% cobalt for exceptional hardness and wear resistance. Its 135° split point tip delivers fast, precise drilling with reduced walking, ideal for hardened metals like stainless steel and cast iron. The set includes a comprehensive range of sizes from 1/16" to 3/8", all housed in a durable metal indexed case for easy organization and portability. Perfect for professionals and serious DIYers demanding reliability and performance.

## Description

GMTOOLS 21 Pieces Cobalt Twist Drill Bit SetM35 Jobber Length with Metal Indexed Storage CaseSpecifications:Material: HSS M35 Cobalt 5%Angle Point: 135 DegreeFlute Type: SpiralShank Type: Straight ShankSize 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", 3/8"M35 Cobalt HSS:Particularly successful in cutting through hard metals, such as stainless steel, cast iron, high temperature alloy, titanium alloy

Review: The drills are of good quality. Drilling ferrous metal and stainless steel went smoothly.
Review: Increíblemente buenas, un excelente filo las e probado en aceros tratados y sin problema perforan, recomendado al 100%

## 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 |
| Batteries Required? | No |
| Batteries included? | No |
| Best Sellers Rank | 989,146 in DIY & Tools ( See Top 100 in DIY & Tools ) 7,993 in Drill Bit Sets |
| Customer Reviews | 4.4 4.4 out of 5 stars (2,259) |
| Date First Available | 27 April 2023 |
| Finish | Hss,Stainless Steel |
| Included components | drill bit |
| Item Weight | 740 g |
| Manufacturer | GMTOOLS |
| Manufacturer reference | 1 |
| Material | Alloy Steel, Stainless Steel |
| Number of Pieces | 21 |
| Package Dimensions | 15.9 x 11.7 x 4 cm; 740 g |
| Part number | 1 |
| Style | 21 pcs Cobalt |

## Product Details

- **Cutting angle string:** 135 Degrees
- **Cutting diameter:** 0.38 Inches
- **Finish type:** Hss,Stainless Steel
- **Material:** Alloy Steel, Stainless 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/41I8LwccciL.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/41Wa-Jd52uL.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/510QYUVNRIL.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/51FBFhXZeFL.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/51WKq0zQlwL.jpg)

## Questions & Answers

**Q: These work pretty well as a general bit set for drilling most metals? Is applying oil generally needed on a surface when drilling?**
A: While in trade school many decades ago, they taught us to use cooling for chisels and drill bits, I did dry drilling many times throughout the years, it works; however, cooling will extend the life of the drill bit for sure. One online resource said the following: If you don't cool, the material will harden and the drilling will get tougher. With special cutting oil, you cool both the material and the drill. This makes the drilling faster and more effective. The drill bits also last longer, because they stay sharp. Hope that this answers your question.

**Q: Are cobalt bits better than titanium bits?**
A: Yes. Cobalt is harder and can drill through harder materials such as stainless steel.

**Q: Is the entire bit comprised of the M35 5% cobalt alloy or is the high cobalt steel just on the surfaces?**
A: The entire bit is comprised of the M35 5% cobalt alloy. That is why they should last longer.

**Q: Will this fit in a standard household drill?**
A: Our goal is to provide our customers with the highest quality and service. Yes this M35 HSS Drill Bit will fit just be mindful that this is a straight shank bit.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Review
*by O***G on 14 January 2026*

The drills are of good quality. Drilling ferrous metal and stainless steel went smoothly.

### ⭐⭐⭐⭐⭐ Review
*by E***O on 23 August 2025*

Increíblemente buenas, un excelente filo las e probado en aceros tratados y sin problema perforan, recomendado al 100%

### ⭐⭐⭐⭐⭐ Review
*by M***A on 14 November 2025*

Better quality than the typical home use bits. Cut good and relatively inexpensive.

## Frequently Bought Together

- GMTOOLS 13Pcs Cobalt Drill Bits Set, M35 HSS 135 Degree Tip, Twist Jobber Length Drill Bit Kit for Hardened Metal, Cast Iron, Stainless Steel, Plastic and Wood with Storage Case 1/16"-1/4"
- Narwhal 1/8 Inch Cobalt Drill Bits (13 Pack - Industrial Grade M35 Cobalt) 2-3/4" Length & 135 Degree Split Point for Drilling Into Metal, Hardened & Stainless Steel, Cast Iron, & More!
- BECOLLO 5/32 Inch Cobalt Drill Bit Set, M35 Jobber Length Twist Drill Bits,Suitable for Drilling in Hard Metal, Stainless Steel, Cast Iron,10 Pieces

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*Product available on Desertcart Kenya*
*Store origin: KE*
*Last updated: 2026-02-01*