---
product_id: 183990958
title: "Astro Pneumatic Tool Astro Tools 9442 Blue Steel 2pc Max-Duty Step Drill Set"
brand: "astro pneumatic tool"
price: "NT$4371"
currency: TWD
in_stock: true
reviews_count: 4
url: https://www.desertcart.tw/products/183990958-astro-pneumatic-tool-astro-tools-9442-blue-steel-2pc-max
store_origin: TW
region: Taiwan
---

# TiALN Finish 0.75" Cutting Diameter Double Fluted Design Astro Pneumatic Tool Astro Tools 9442 Blue Steel 2pc Max-Duty Step Drill Set

**Brand:** astro pneumatic tool
**Price:** NT$4371
**Availability:** ✅ In Stock

## Summary

> 🔧 Drill Your Way to Perfection!

## Quick Answers

- **What is this?** Astro Pneumatic Tool Astro Tools 9442 Blue Steel 2pc Max-Duty Step Drill Set by astro pneumatic tool
- **How much does it cost?** NT$4371 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.tw](https://www.desertcart.tw/products/183990958-astro-pneumatic-tool-astro-tools-9442-blue-steel-2pc-max)

## Best For

- astro pneumatic tool enthusiasts

## Why This Product

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

## Key Features

- • **Durable Coating:** Titanium Aluminum Nitride (TiALN) for extreme heat and wear resistance.
- • **Compact & Lightweight:** Easy to handle with a total weight of just 3.73 ounces.
- • **Precision Engineering:** Crafted for perfectly round holes with sharp cutting angles.
- • **Versatile Applications:** Effortlessly drills through materials from sheet metal to ½” thick plate.
- • **Self-Renewing Technology:** Unique formulation that replaces itself as it wears, ensuring longevity.

## Overview

The Astro Pneumatic Tool 9442 Blue Steel 2pc Max-Duty Step Drill Set features two professional-grade step drills designed for precision and durability. With a cutting diameter of up to ¾” and a unique TiALN finish, these drills are engineered to withstand extreme conditions while providing clean, round holes in various materials. Ideal for both professionals and DIY enthusiasts, this set combines advanced technology with user-friendly design.

## Description

The Astro Pneumatic Tool 9442 Blue Steel 2-Piece Max-Duty Step Drill Set is the ultimate multi-purpose max duty option for professionals. Including the two most popular automotive sizes (up to ½” by 32ths and ¾” by 16ths) these 3-flatted shank step drills feature Titanium Aluminum-Nitride for the greatest possible heat and wear prevention. This unique formulation replaces itself with an additional clear oxide wear preventing coating when worn away after extended use. Together with a double fluted design for clean round cuts, this set is made to laser through everything from sheet metal and stainless to ½” thick cold formed plate.

## Features

- Two professional duty step-drills in popular sizes, up to ½” by 32ths and up to ¾” by 16ths
- Titanium Aluminum Nitride (TiALN) for extreme heat and wear prevention, not just a decorative coating like most step drills
- Unique formulation continually replaces itself with a clear oxide wear preventative coating as it wears away from use
- Double fluted design for perfectly round holes with shapr cutting angles to quickly drill through everything from sheet metal to ½” thick plate

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Material | Alloy Steel |
| Cutting Diameter | 0.75 Inches |
| Finish Type | Titanium Aluminum Nitride |
| Shank Type | Round |
| Brand | Astro Pneumatic Tool |
| Item dimensions L x W x H | 7.2 x 5 x 0.8 inches |
| Tool Flute Type | Spiral |
| Minimum Bore Diameter | 0.53 Inches |
| Surface Recommendation | Alloy Steel |
| Number of Flutes | 2 |
| UPC | 745227070824 |
| Unit Count | 2.0 Count |
| Global Trade Identification Number | 00745227070824 |
| Manufacturer | Astro Pneumatic Tool |
| Part Number | 9442 |
| Item Weight | 3.73 ounces |
| Product Dimensions | 7.2 x 5 x 0.8 inches |
| Item model number | 9442 |
| Color | Standard |
| Finish | Titanium Aluminum Nitride |
| Item Package Quantity | 1 |
| Measurement System | Imperial |
| Included Components | Blue Steel 2pc Max-Duty Step Drill Set |
| Batteries Included? | No |
| Batteries Required? | No |
| Warranty Description | Manufacturer’s Warranty |

## Images

![Astro Pneumatic Tool Astro Tools 9442 Blue Steel 2pc Max-Duty Step Drill Set - Image 1](https://m.media-amazon.com/images/I/71BxafDWJsL.jpg)
![Astro Pneumatic Tool Astro Tools 9442 Blue Steel 2pc Max-Duty Step Drill Set - Image 2](https://m.media-amazon.com/images/I/71nr43plCWL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ 5.0 out of 5 stars







  
  
    Works great!
  

*by M***. on Reviewed in the United States on August 13, 2023*

These are outstanding bits.

### ⭐⭐⭐⭐⭐ 5.0 out of 5 stars







  
  
    Good tool
  

*by S***N on Reviewed in the United States on January 28, 2022*

These things are great still sharp after 6 months of use

### ⭐⭐⭐⭐⭐ 







  
  
    Good Step Drills
  

*by D***E on Reviewed in Canada on July 8, 2022*

After using titanium coated and cobalt step drills, I have to say I really like these Astro ones. They have stayed sharp and cut very well when widening holes. The coating on these is self-replenishing and so far that seems to be true as I've noticed no change to the color of the coating unlike titanium coated ones which quickly lose their coating. They also cut as fast as cobalt step drills I've used.Considering this is a 2 pack with a decent size range, for most people this set should cover all your step drill needs. I'd certainly recommend picking up a pack as once you have these in your tool arsenal, you'll find plenty of uses for them.

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**Shop now:** [https://www.desertcart.tw/products/183990958-astro-pneumatic-tool-astro-tools-9442-blue-steel-2pc-max](https://www.desertcart.tw/products/183990958-astro-pneumatic-tool-astro-tools-9442-blue-steel-2pc-max)

---

*Product available on Desertcart Taiwan*
*Store origin: TW*
*Last updated: 2026-03-13*