---
product_id: 430998172
title: "Cobalt Drill Bit Set (1/16-1/2 Inch, 17PCS), M35 High Speed Steel Twist Drill Bits for Stainless Steel, Hard Metal, Cast Iron, Plastic and Wood"
brand: "stroton"
price: "$103.19"
currency: USD
in_stock: true
reviews_count: 12
category: "Stroton"
url: https://www.desertcart.ec/products/430998172-cobalt-drill-bit-set-1-16-1-2-inch-17pcs
store_origin: EC
region: Ecuador
---

# 68 HRC Rockwell Hardness for heat resistance 5% Cobalt Steel for ultimate durability 17 precision sizes from 1/16 to 1/2 inch Cobalt Drill Bit Set (1/16-1/2 Inch, 17PCS), M35 High Speed Steel Twist Drill Bits for Stainless Steel, Hard Metal, Cast Iron, Plastic and Wood

**Brand:** stroton
**Price:** $103.19
**Availability:** ✅ In Stock

## Summary

> ⚡ Drill Like a Pro, Last Like a Legend

## Quick Answers

- **What is this?** Cobalt Drill Bit Set (1/16-1/2 Inch, 17PCS), M35 High Speed Steel Twist Drill Bits for Stainless Steel, Hard Metal, Cast Iron, Plastic and Wood by stroton
- **How much does it cost?** $103.19 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.ec](https://www.desertcart.ec/products/430998172-cobalt-drill-bit-set-1-16-1-2-inch-17pcs)

## Best For

- stroton enthusiasts

## Why This Product

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

## Key Features

- • **Precision Engineered:** 135° split point design delivers clean, burr-free holes every time, boosting your project’s professional finish.
- • **Unmatched Durability:** Premium M35 cobalt steel ensures your bits stay sharper, longer—cutting through stainless steel and hard metals with ease.
- • **Versatile Size Range:** 17-piece set covers all your drilling needs from delicate plastics to tough cast iron—never get caught without the right bit.
- • **Speed Meets Efficiency:** Run 2-3x faster drilling speeds with superior heat and wear resistance, reducing downtime and maximizing productivity.
- • **Secure Storage & Warranty:** Robust case with tight bit clamps keeps your set organized and protected, backed by a hassle-free replacement warranty.

## Overview

The STROTON Cobalt Drill Bit Set features 17 high-performance M35 cobalt steel bits with a 135° split point, engineered for superior heat resistance and durability. Designed to drill through stainless steel, cast iron, plastics, and wood, this set offers unmatched speed and precision, making it the go-to choice for professionals and serious DIYers alike.

## Description

STROTON Cobalt Drill Bit Set (1/16-1/2 Inch, 17PCS), M35 High Speed Steel Twist Drill Bits for Stainless Steel, Hard Metal, Cast Iron, Plastic and Wood - desertcart.com

Review: BEST I have ever owned (76-year-old woodworker) - This is by far, the very best and highest quality drill bit set I have ever owned. Unlike other bits I have encountered, these bits stay sharp and get the job done. They are ideal for drilling through steel and iron plates leaving sharp, clean holes every time. The warranty is also great - break a bit and they will replace it free of charge. Warranty card is inside drill box. While I'm praising the bits, let me also acknowledge that the drill bit storage box is really nice too. Yes, it's plastic, but the quality stands out from other brands as well. The bit clamps actually "hold" the bits tightly in place while stored, and the closure mechanism is top of the line too. I am NOT a paid reviewer or someone who got the product so I would review it. These are my actual assessments of this product. I just felt strongly enough about it to let others know what a great product it is and give STROTON their deserved credit.
Review: Great set. - Great set. Having two of the some of the small or more commonly used bits is much appreciated. Case is solid and holds the bits in place without making them difficult to remove.

## Features

- Premium 5% Cobalt Steel ,68 HRC (Rockwell Hardness Scale) ,the Cobalt Usually Give the Best Heat,Wear and Chip Resistance and Long Tool Life.
- The Cutting Edge has been Ground Three Times and is made of Cobalt Steel, which has High Hardness and Heat Resistance. It is Designed for Drilling through Stainless Steel, Hardened Steel, Iron, Aluminum, Pipes, Wood, PVC, and Plastics.
- This Heavy Duty Work Cobalt Drill Bit is Typically Capable of Running Two to Three Times Faster.Despite the Higher Price,the Cost Per Hole When Using Cobalt Drill Bit Will be the Lowest,Since It Can Produce So Many More Holes.
- The Sufficiently Sharp Bit Edge Can Cut the Metal Material into Long Strips of Iron Chips rather than Slowly Grinding Through the Material with a Blunt Drill Bit.
- 17Pcs 135 Degree Cobalt Industrial Hss Drill Bits Kit Includes :1/16 (2pcs), 5/64, 3/32 (2pcs), 7/64, 1/8 (2pcs), 9/64, 5/32, 3/16, 7/32, 1/4 (2pcs), 5/16, 3/8, 1/2 .

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B09MRW8399 |
| Best Sellers Rank | #50,943 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #96 in Jobber Drill Bits |
| Brand | STROTON |
| Cutting Angle String | 135 Degrees |
| Cutting Diameter | 0.5 Inches |
| Date First Available | April 13, 2022 |
| Finish Type | Steel |
| Item Weight | 1.14 pounds |
| Item dimensions L x W x H | 7.09 x 5.12 x 1.57 inches |
| Item model number | Cobalt 6 series bits inch 1/16-1/2 |
| Manufacturer | STROTON Ltd |
| Material | Cobalt |
| Number of Flutes | 2 |
| Number of Pieces | 17 |
| Point Style | Split Point |
| Product Dimensions | 7.09 x 5.12 x 1.57 inches |
| Set Name | 17-Piece Set |
| Shank Type | 3-flats,Round |
| Surface Recommendation | Cast Iron,Metal,Plastic,Stainless Steel,Steel,Wood |
| Tool Flute Type | Straight |
| UPC | 643459994935 |
| Unit Count | 1.0 Count |

## Product Details

- **Cutting Angle String:** 135 Degrees
- **Cutting Diameter:** 0.5 Inches
- **Finish Type:** Steel
- **Material:** Cobalt
- **Shank Type:** 3-flats,Round

## Images

![Cobalt Drill Bit Set (1/16-1/2 Inch, 17PCS), M35 High Speed Steel Twist Drill Bits for Stainless Steel, Hard Metal, Cast Iron, Plastic and Wood - Image 1](https://m.media-amazon.com/images/I/419j9VPvudL.jpg)
![Cobalt Drill Bit Set (1/16-1/2 Inch, 17PCS), M35 High Speed Steel Twist Drill Bits for Stainless Steel, Hard Metal, Cast Iron, Plastic and Wood - Image 2](https://m.media-amazon.com/images/I/41FCBvJEczL.jpg)
![Cobalt Drill Bit Set (1/16-1/2 Inch, 17PCS), M35 High Speed Steel Twist Drill Bits for Stainless Steel, Hard Metal, Cast Iron, Plastic and Wood - Image 3](https://m.media-amazon.com/images/I/51+gBcKaqzL.jpg)
![Cobalt Drill Bit Set (1/16-1/2 Inch, 17PCS), M35 High Speed Steel Twist Drill Bits for Stainless Steel, Hard Metal, Cast Iron, Plastic and Wood - Image 4](https://m.media-amazon.com/images/I/51STWiI8JzL.jpg)
![Cobalt Drill Bit Set (1/16-1/2 Inch, 17PCS), M35 High Speed Steel Twist Drill Bits for Stainless Steel, Hard Metal, Cast Iron, Plastic and Wood - Image 5](https://m.media-amazon.com/images/I/51mfTLMIgdL.jpg)

## Available Options

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

## Questions & Answers

**Q: Are these good for make holes in steel material?**
A: Yes，good for drilling steel.Generally, sellers purchase products from the market and sell them on e-commerce platforms. The STROTON drill bits we sell are designed and produced by our factory, including the case, which is unique on the market. This drill bit contains 6% cobalt, which is higher than general products. In addition, STROTON hss drill bits have a secret heat treatment recipe.So They’re good at drilling steel.

**Q: Where are these made?**
A: They are made in China. 
They are very good cobalt drill bits set.It is designed and manufactured by STROTON, different from the similar products in the market.

## Customer Reviews

### ⭐⭐⭐⭐⭐ BEST I have ever owned (76-year-old woodworker)
*by G***D on January 10, 2026*

This is by far, the very best and highest quality drill bit set I have ever owned. Unlike other bits I have encountered, these bits stay sharp and get the job done. They are ideal for drilling through steel and iron plates leaving sharp, clean holes every time. The warranty is also great - break a bit and they will replace it free of charge. Warranty card is inside drill box. While I'm praising the bits, let me also acknowledge that the drill bit storage box is really nice too. Yes, it's plastic, but the quality stands out from other brands as well. The bit clamps actually "hold" the bits tightly in place while stored, and the closure mechanism is top of the line too. I am NOT a paid reviewer or someone who got the product so I would review it. These are my actual assessments of this product. I just felt strongly enough about it to let others know what a great product it is and give STROTON their deserved credit.

### ⭐⭐⭐⭐⭐ Great set.
*by M***N on January 7, 2026*

Great set. Having two of the some of the small or more commonly used bits is much appreciated. Case is solid and holds the bits in place without making them difficult to remove.

### ⭐⭐⭐⭐⭐ Very well made. Durable
*by B***. on December 27, 2025*

These are so top grade. My grandson loved them and was bummed very excited.

## Frequently Bought Together

- STROTON Cobalt Drill Bit Set (1/16-1/2 Inch, 17PCS), M35 High Speed Steel Twist Drill Bits for Stainless Steel, Hard Metal, Cast Iron, Plastic and Wood
- amoolo 3/8" Cobalt Drill Bit(5Pcs), M35 HSS Metal Drill Bit Set for Hard Metal, Stainless Steel, Cast Iron
- BECOLLO 1/4 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 Ecuador*
*Store origin: EC*
*Last updated: 2026-02-05*