---
product_id: 224044451
title: "- 4-32mm Metric 5% Cobalt Step Drill Bit for Stainless Steel and Hard Metal (15 Steps)"
brand: "stroton"
price: "291 Lei"
currency: RON
in_stock: true
reviews_count: 8
url: https://www.desertcart.ro/products/224044451-4-32mm-metric-5-cobalt-step-drill-bit-for-stainless
store_origin: RO
region: Romania
---

# 66-69 HRC hardness 4-32mm size range M35 5% Cobalt Steel - 4-32mm Metric 5% Cobalt Step Drill Bit for Stainless Steel and Hard Metal (15 Steps)

**Brand:** stroton
**Price:** 291 Lei
**Availability:** ✅ In Stock

## Summary

> 🔧 Drill Like a Pro with STROTON!

## 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?** 291 Lei with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.ro](https://www.desertcart.ro/products/224044451-4-32mm-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

- • **Speed Demon:** Drills 2-3 times faster than standard bits, saving you valuable time.
- • **Cost-Effective:** Lower cost per hole due to superior longevity and performance.
- • **Comprehensive Range:** 15-step design for precise drilling from 4mm to 32mm.
- • **Precision Engineering:** Crafted from premium M35 5% cobalt steel for unmatched durability.
- • **Versatile Applications:** Effortlessly cuts through stainless steel, aluminum, wood, and more.

## Overview

The STROTON 4-32mm Metric 5% Cobalt Step Drill Bit is engineered for professionals seeking efficiency and precision. Made from premium M35 cobalt steel, it boasts a hardness rating of 66-69 HRC, ensuring exceptional heat and wear resistance. With a versatile 15-step design, this drill bit is perfect for a variety of materials, making it a must-have for any toolkit.

## Description

4-32mm Metric 5% Cobalt Step Drill Bit for Stainless Steel and Hard Metal (15 Steps)

## 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)

## Product Details

- **Material:** Cobalt, Cobalt Steel
- **Cutting Diameter:** 4-32 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)

## Available Options

This product comes in different **Pattern Name** options.

## 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

### ⭐⭐⭐⭐⭐ Great Bit
*by M***P on June 30, 2025*

All metal bits are consumable in my opinion. But this one is lasting a really long time. Very sharp, and with proper tap oil cuts very clean holes in aluminum and steel. Price is great, so I’ll buy another in anticipation of eventual failure, and will probably continue to buy more.

### ⭐⭐⭐⭐⭐ This is a very good bit
*by M***T on November 26, 2023*

I am a Journeyman sheet metal worker (retired). I had my tools stolen and I needed a uni-bit for stainless. Good thing: it starts itself. That first penetration takes a bit of time ( keep the oil up!) but once it does it really rips. Be careful that once the hole is started slow the speed and lighten up on the pressure, Otherwise this will bite hard and possibly warp your work (and hurt your wrist) depending on thickness. I was drilling a 18 ga. backsplash. I got a few minor distortions because this bit bit hard. The trim piece for my faucet covered them. I have had other cobalt bits before but this is the best.

### ⭐⭐⭐⭐ Worked great
*by C***K on April 24, 2024*

If drilling thru stainless use cutting oil and this will last. This drill did the job.

## 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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**Shop now:** [https://www.desertcart.ro/products/224044451-4-32mm-metric-5-cobalt-step-drill-bit-for-stainless](https://www.desertcart.ro/products/224044451-4-32mm-metric-5-cobalt-step-drill-bit-for-stainless)

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*Product available on Desertcart Romania*
*Store origin: RO*
*Last updated: 2026-02-09*