---
product_id: 386584137
title: "4-32mm Metric 5% Cobalt Step Drill Bit for Stainless Steel and Hard Metal (15 Steps)"
brand: "stroton"
price: "€ 49.98"
currency: EUR
in_stock: true
reviews_count: 5
category: "Stroton"
url: https://www.desertcart.it/products/386584137-4-32mm-metric-5-cobalt-step-drill-bit-for-stainless
store_origin: IT
region: Italy
---

# 2-3x faster drilling speed 66-69 HRC ultra-hard cobalt steel 15 precise step sizes (4-32mm) 4-32mm Metric 5% Cobalt Step Drill Bit for Stainless Steel and Hard Metal (15 Steps)

**Brand:** stroton
**Price:** € 49.98
**Availability:** ✅ In Stock

## Summary

> ⚡ Drill Smarter, Not Harder — Own the Power of Precision!

## Quick Answers

- **What is this?** 4-32mm Metric 5% Cobalt Step Drill Bit for Stainless Steel and Hard Metal (15 Steps) by stroton
- **How much does it cost?** € 49.98 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.it](https://www.desertcart.it/products/386584137-4-32mm-metric-5-cobalt-step-drill-bit-for-stainless)

## 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

- • **Unmatched Durability:** Crafted from premium M35 5% cobalt steel with 66-69 HRC hardness for superior heat and wear resistance.
- • **Multi-Material Mastery:** Engineered to cut cleanly through stainless steel, iron, aluminum, PVC, wood, and more with ease.
- • **Speed Meets Efficiency:** Drills through stainless steel and hard metals 2-3 times faster, saving you time on every project.
- • **Precision in Every Step:** 15 graduated drill sizes from 4mm to 32mm for versatile, exact hole-making.
- • **Cost-Effective Longevity:** Despite premium price, lower cost per hole thanks to extended tool life and fewer replacements.

## Overview

The STROTON 4-32mm Metric 5% Cobalt Step Drill Bit features 15 stepped sizes for versatile drilling, made from premium M35 cobalt steel with a Rockwell hardness of 66-69 HRC. Designed for high heat and wear resistance, it cuts through stainless steel, hard metals, and multiple materials 2-3 times faster than standard bits, delivering long-lasting performance and cost efficiency for professional-grade projects.

## Description

（Ⅰ）Product Advantages: (1) The "Cobalt" from STROTON ,Add enough rare metals from STROTON to ensure the quality.(2)This step drill bit is made of Premium Cobalt (80,000 dollars per ton). (3)This step drill bit works in materials such as sheet metal, ducts, steel, copper, brass, aluminum, plastic, vinyl siding, plasterboard, PVC, stainless steel and cast iron. （Ⅱ）Some Important Tips about drilling stainless steel and hard metal: (1)Running the step bit at Low Speeds and using a little appropriate cutting fluid (Drillling metal) will extend its service life. (2)Adding cutting fluid, engine oil or water to prevent the stainless steel from overheating and forming a very hard oxide layer.It also works adding some vinegar,soy sauce if you don't have cutting fluid. (3)Cutting Thickness ___________________________________ Stainless Steel Sheet ----------------------- Hand Drill ≤2mm Drill Press ≤5mm ___________________________________ Metal Sheet,Pvc,Woodboard and etc --------------------------------------- Hand Drill ≤5mm Drill Press ≤5mm _____________________________________

Review: Buenísima - La mejor que he usado en mi vida. Hice huecos en tubo de 4mm como si fuera mantequilla
Review: Great drill bit!

## Features

- Premium M35 5% Cobalt Steel ,66-69 HRC (Rockwell Hardness Scale) ,Usually Give the Best Heat,Wear and Chip Resistance and Long Tool Life.
- Grinding the Cutting Edge Three Times,with the High HRC and Heat Resistance of the Material,Desigh for Cutting through Stainless steel , Iron plate, Aluminum,Ducts,Wood,PVC and Plastic.
- This Cobalt Step 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.
- [4-32mm] 15 Steps (4mm,6mm,8mm,10mm,12mm,14mm,16mm,18mm,20mm,22mm,24mm,26mm,28mm,30mm,32mm)

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0886JKJMD |
| Best Sellers Rank | #47,641 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #10 in Step Drill Bits #57 in Metalworking & Multi-purpose Drill Bits |
| Brand | STROTON |
| Brand Name | STROTON |
| Customer Reviews | 4.6 out of 5 stars 1,104 Reviews |
| Cutting Angle String | 135 Degrees |
| Cutting Diameter | 32 Millimeters |
| Cutting angle string | 135 Degrees |
| Cutting diameter | 32 Millimeters |
| Finish Types | Brass |
| Finish type | Brass |
| Item Dimensions | 14.8 x 7.2 x 4.1 centimeters |
| Manufacturer | STROTON |
| Material | Cobalt |
| Material Type | Cobalt |
| Minimum Bore Diameter | 4 Millimeters |
| Model | Cobalt-15s-(4-32mm) |
| Number of Flutes | 1 |
| Point Style | Taper Point |
| Shank Type | Straight |
| Shank type | Straight |
| Surface Recommendation | Iron, Stainless Steel, Iron Plate, Aluminium, Wood, PVC, Plastic |
| Tool Flute Type | Spiral |
| UPC | 630808641435 |
| Unit Count | 1.0 Count |

## Product Details

- **Material:** Cobalt
- **Cutting diameter:** 32 Millimeters
- **Finish type:** Brass
- **Shank type:** Straight
- **Cutting angle string:** 135 Degrees

## Images

![4-32mm Metric 5% Cobalt Step Drill Bit for Stainless Steel and Hard Metal (15 Steps) - Image 1](https://m.media-amazon.com/images/I/51tNeQl23gL.jpg)

## Questions & Answers

**Q: what is the recommended speed for this bit for stainless steel?**
A: I use an ancient Craftsman 1/2 horse with one speed (400RPM) and can get through anything.

**Q: Will this bit drill cast iron pipe?**
A: I have used the bit on stainless, carbon, galvanized, and aluminum. One recurring issue is as each step breaks through, it catches and hard stops the bit. That action might cause cast to crack, especially on the larger diameter holes.

**Q: Is this left-handed threaded?**
A: This is a step drill. It has no threads

## Customer Reviews

### ⭐⭐⭐⭐⭐ Buenísima
*by C***N on 11 December 2025*

La mejor que he usado en mi vida. Hice huecos en tubo de 4mm como si fuera mantequilla

### ⭐⭐⭐⭐⭐ Great drill bit!
*by L***G on 26 August 2025*



### ⭐⭐⭐⭐⭐ Sehr gute Qualität
*by P***M on 25 February 2025*

Gute Verpackung, Schnelle Lieferung, Sehr gute Qualität, Kaufen gerne wieder,

## Frequently Bought Together

- STROTON 4-32mm Metric 5% Cobalt Step Drill Bit for Stainless Steel and Hard Metal (15 Steps)
- Metric M42 8% Cobalt Twist Drill Bits Set for Stainless Steel and Hard Metal (1mm-10mm/19pcs)
- Forney 20857 Tap Magic Industrial Pro Cutting Fluid, 4 oz

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*Product available on Desertcart Italy*
*Store origin: IT*
*Last updated: 2026-02-20*