---
product_id: 16289979
title: "Step Drill Bit Set, 7/8-Inch to 1-1/8-Inch (DWA1789IR)"
brand: "dewalt"
price: "KSh27087"
currency: KES
in_stock: true
reviews_count: 13
category: "Dewalt"
url: https://www.desertcart.co.ke/products/16289979-step-drill-bit-set-7-8-inch-to-1-1
store_origin: KE
region: Kenya
---

# Split point tip for faster, precise drilling Two-flute spiral design for efficient chip removal Titanium Nitride Coating for durability Step Drill Bit Set, 7/8-Inch to 1-1/8-Inch (DWA1789IR)

**Brand:** dewalt
**Price:** KSh27087
**Availability:** ✅ In Stock

## Summary

> 🔧 Drill smarter, faster, stronger — own the job site with DEWALT precision!

## Quick Answers

- **What is this?** Step Drill Bit Set, 7/8-Inch to 1-1/8-Inch (DWA1789IR) by dewalt
- **How much does it cost?** KSh27087 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/16289979-step-drill-bit-set-7-8-inch-to-1-1)

## Best For

- dewalt enthusiasts

## Why This Product

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

## Key Features

- • **Unmatched Durability:** Titanium Nitride coating extends bit life, keeping you ahead on every project.
- • **Speed Meets Precision:** Split point tip accelerates drilling while maintaining pinpoint accuracy.
- • **Effortless Chip Removal:** Two-flute spiral design clears debris fast, reducing downtime.
- • **Impact-Ready Performance:** Optimized for impact drivers, built to handle tough materials with ease.
- • **Laser-Engraved Visibility:** Clear step markings ensure flawless hole sizing every time.

## Overview

The DEWALT DWA1789IR Step Drill Bit Set (7/8" to 1-1/8") features a titanium nitride coating for extended durability, a two-flute spiral design for superior chip removal, and a split point tip that boosts drilling speed and accuracy. Laser-engraved step markings enhance visibility, and the bit is optimized for impact driver use, making it a reliable choice for professionals tackling alloy and structural steel.

## Description

The DEWALT DWA1789IR 7/8-Inch-1-1/8-Inch impact ready step drill bit has a split point tip that increases speed. Its laser engraved numbers increase step visibility and while optimized for impact driver usage, this bit does work with rotary drills.

Review: Good - Use it often, really like the bit.
Review: Holy cow batman, this thing works great! - I don't know what it's made of, but it is hard and sharp. Goes through structural steel so much better and faster than other drill bits that are supposed to be good. I haven't tried it on stainless steel yet, but the holes it drills into structural steel are comparable to how good individual M35 bits perform on structural steel, and since those same M35 bits will go through stainless, then I'm confident this Dewalt step bit will go through stainless steel just as well. I will have an opportunity to test it on stainless steel in about a week from now and can give an update afterwards. Update: I picked up 2 other step bits, one Oxmul M35 (5% cobalt) and one Stroton (6% cobalt). The Dewalt similarly outperformed those as well. I drilled stainless steel with the Dewalt and got a surprise---it quickly accelerated in expanding/drilling out the hole once a pilot hole was created. All drilling was done with moderate even pressure at relatively slow speed.

## Features

- Titanium Nitride Coated two flute spiral design provides longer life and better chip removal
- Split point tip increases speed
- Laser engraved numbers increases step visibility
- Optimized for impact driver usage

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0090IHBQE |
| Assembled Diameter | 1.13 Inches |
| Batteries Included? | No |
| Batteries Required? | No |
| Best Sellers Rank | #43,810 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #67 in Step Drill Bits |
| Brand | DEWALT |
| Color | Multi |
| Customer Reviews | 4.7 4.7 out of 5 stars (1,746) |
| Cutting Angle String | 135 Degrees |
| Cutting Diameter | 1.13 Inches |
| Date First Available | August 21, 2012 |
| Finish | Titanium Nitride |
| Finish Type | Titanium Nitride |
| Global Trade Identification Number | 00885911294096 |
| Included Components | 2 Steps: 7/8" and 1-1/8" |
| Is Discontinued By Manufacturer | No |
| Item Package Quantity | 1 |
| Item Weight | 0.16 ounces |
| Item model number | DWA1789IR |
| Manufacturer | DEWALT |
| Material | Titanium Nitride Coated |
| Measurement System | Inch |
| Number of Flutes | 2 |
| Number of Pieces | 1 |
| Part Number | DWA1789IR |
| Pattern | Solid |
| Point Style | Split Point |
| Set Name | DEWALT Step Drill Bit Set |
| Shank Type | Straight |
| Shape | Rectangular |
| Size | 7/8" - 1-1/8" (Pack of 1) |
| Style | 7/8" - 1-1/8" |
| Surface Recommendation | Alloy Steel |
| Tool Flute Type | Spiral |
| UPC | 885911294096 |
| Unit Count | 1.0 Count |

## Product Details

- **Brand:** DEWALT
- **Cutting Angle String:** 135 Degrees
- **Finish Type:** Titanium Nitride
- **Material:** Titanium Nitride Coated
- **Shank Type:** Straight

## Images

![Step Drill Bit Set, 7/8-Inch to 1-1/8-Inch (DWA1789IR) - Image 1](https://m.media-amazon.com/images/I/5197aeIgBXL.jpg)

## Questions & Answers

**Q: Do these work with the small 1/4 drive impacts?**
A: Yes, the DWA1790IR will work with the 1/4" Impact Driver.

**Q: Why do they advertise this as 7/8-Inch-1-1/8-Inch. Looks like it also does up to 7/8?**
A: I think the statement implies that is capable of doing an 7/8 hole for an 1/2 ko, and an 1 1/8 for a 1 inch ko. Also its a great step bit!

**Q: has anyone used these with stainless steel ? im looking at regular use with ss electrical panels and sheeting up to 1/4" thick.**
A: Yep, can be use with stainless steel like butter :)

**Q: Does these bits come in a carry case or bag**
A: No, this will not include a case or bag.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Good
*by M***L on December 3, 2025*

Use it often, really like the bit.

### ⭐⭐⭐⭐⭐ Holy cow batman, this thing works great!
*by V***S on January 12, 2023*

I don't know what it's made of, but it is hard and sharp. Goes through structural steel so much better and faster than other drill bits that are supposed to be good. I haven't tried it on stainless steel yet, but the holes it drills into structural steel are comparable to how good individual M35 bits perform on structural steel, and since those same M35 bits will go through stainless, then I'm confident this Dewalt step bit will go through stainless steel just as well. I will have an opportunity to test it on stainless steel in about a week from now and can give an update afterwards. Update: I picked up 2 other step bits, one Oxmul M35 (5% cobalt) and one Stroton (6% cobalt). The Dewalt similarly outperformed those as well. I drilled stainless steel with the Dewalt and got a surprise---it quickly accelerated in expanding/drilling out the hole once a pilot hole was created. All drilling was done with moderate even pressure at relatively slow speed.

### ⭐⭐⭐⭐⭐ Top of the Line Bit, albeit pricey
*by A***D on April 14, 2023*

I began my project using bits from a local hardware discount store (Warrior brand) on sale for $8.99: drilled the first hole okay though I had to drill a pilot hole to get it started; then it got dull quickly and I struggled to do a couple more holes in my new fire pit ring. Watched a You Tube review of the Dewalt bits that showed it beating all other brands so I forked out the 5x cost to try it. Total "game changer"! The 3/16" starter step eliminated the pilot hole drilling other brands seem to require. This Dewalt bit cut through the steel like butter. I drilled a total of 56ea, 9/16" holes and the last hole cut just as easy as the first with no apparent dulling. Will never buy another drill bit brand; I'm completely sold. BTW, I also used an impact driver instead of your standard drill. Performed beautifully together!

## Frequently Bought Together

- DEWALT Step Drill Bit Set, 7/8-Inch to 1-1/8-Inch (DWA1789IR)
- Forney 20857 Tap Magic Industrial Pro Cutting Fluid, 4 oz

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*Product available on Desertcart Kenya*
*Store origin: KE*
*Last updated: 2026-02-20*