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DEWALT

DEWALT Step Drill Bit Set:3 Piece, Titanium Nitride Coated, 31 Hole Sizes, 1/8 in to 7/8 in, 1/4 in Shank Hex Size (DWA1790IR)

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Availability: In Stock.
Fulfilled by Amazon
Arrives Friday, Jun 19
Order within 17 hours and 34 minutes
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Style: 3 PC Set


Features

  • Titanium Nitride Coated two flute spiral design provides longer life and better chip removal for the DEWALT drill bit set
  • Split point tip of the drill bit increases speed
  • Laser engraved numbers increases step visiblity
  • 1/4-inch hex shank
  • Optimized for impact driver usage

Description

The DEWALT Metal Drill Bit Set features 3 innovative titanium step drill bits to power through a range of applications. Each drill bit is equipped with a split-point tip that helps to increase speed and starts on contact. An innovative double-spiral flute design delivers long life and outstanding chip removal. Laser-engraved numbers helps to increase step visibility. Optimized for impact drivers. Works with rotary drills.

Material: Titanium Nitride Coated


Cutting Diameter: 6.5 millimeters Millimeters


Finish Type: Titanium Nitride


Shank Type: Hex


Cutting Angle String: 135 Degrees


Brand Name: DEWALT


Model: DWA1790IR


UPC: 885911294102


Set Name: 3-Piece


Unit Count: 1.0 Count


Global Trade Identification Number: 02


Manufacturer: DeWalt


Part Number: DWA1790IR


Number of Pieces: 1


Item Weight: 0.31 Pounds


Item Type Name: Dewalt DWA1790IR


Included Components: DWA1790IR - 3 Piece Impact Ready Step Drill Bit Set with multiple sizes (1/8"-1/2", 3/16"-1/2", and 3/16"-7/8")


Cutting Diameter: 6.5 millimeters Millimeters


Item Dimensions: 6 x 5 x 0.88 inches


Minimum Bore Diameter: 3.25 Millimeters


Material Type: Titanium Nitride Coated


Finish Types: Titanium Nitride


Shank Type: Hex


Surface Recommendation: Door,Metal,Steel


Cutting Angle String: 135 Degrees


Tool Flute Type: Spiral


Point Style: Split Point


Number of Flutes: 2


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Friday, Jun 19

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

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Top Amazon Reviews

    • It’s a bit out of step!
This is a great step bit set. It cuts smoothly and I am just a Dewalt die hard user. There is not much to write on because it has one job function. Cut through metal with ease and last.
Reviewed in the United States on January 25, 2026 by Joshua Mendiola
    • A Reliable and Durable Drill Bit Set
The DEWALT Drill Bit Set with titanium nitride coating is a reliable and durable set for any drilling job. The set includes three pieces with sizes ranging from 1/8 inch to 1/2 inch, allowing for versatility in drilling applications. The titanium nitride coating on each bit provides a longer life and better chip removal than other drill bit sets, making it a great choice for both professional and DIY projects. The 135-degree split point design also ensures precise and accurate drilling without the need for a pilot hole. The bits are constructed with heavy-duty materials, ensuring they can withstand the toughest drilling tasks. They are also compatible with a wide range of drilling tools, including cordless drills and impact drivers. Overall, the DEWALT Drill Bit Set is a solid investment for anyone who needs reliable and durable drill bits that can handle a variety of drilling applications. ... show more
Reviewed in the United States on March 12, 2023 by Mike S.
    • Great quality
Best drill bits money can buy. I’ve researched lots of brands and these are truly the best. Goes through 3/8” metal with a pilot hole and lubricant with ease. They’re very sharp and clean cutting and make quick work of metal projects
Reviewed in the United States on September 23, 2025 by Adam D Stavros
    • Works Great!
Don't know how I lived without these before now! Sharp, quick cutting, and fit within an impact driver. Not going back to regular except for deep cuts.
Reviewed in the United States on March 25, 2026 by MSK
    • Works as expected - but labeling is generally not readible
The bits are what you expect, but the labeling on them is kind-of important. When you are drilling and you want to drill to a specific size - the bits change sizes very quickly, and the writing of the sizes on the bits themselves are generally unreadable on two of the three. And that's when you are holding them in your hand all perfect & clean. Imagine how hard it is when doing work & it's in your drill. Virtually impossible. You have to guess. ... show more
Reviewed in the United States on December 7, 2019 by ForrestA
    • Great product worth the price
You can't go wrong with brand name products. Last longer and runs cooler. Highly recommend product and seller. I couldn't be happier with my purchase.
Reviewed in the United States on November 17, 2025 by Ed
    • Just make sure you know what you're drilling.
These are great for mild steel, but you'll want something harder for harder materials. I grabbed one of these drill bits and started drilling away at what I thought was a piece of scrap mild steel. First hole went fine. Second hole and the 3rd or 4th step up, the drill bit just stopped cutting. Rather than use common sense, I immediately took a brand new other brand name HSS cobalt drill bit and tried to continue the hole. That drill bit was dull within seconds. So the fact that these stepper bits lasted through one hole says something good about them. ... show more
Reviewed in the United States on November 22, 2025 by Sean C.
    • Great kit
I believe the value for money in this kit is clear as there isn't the need to purchase multiple drill bits to work with. I can't say how durable it is but considering that I've used one bit to drill over 40 holes in different metal thickness, I believe it should be able to get to 100 and still be drilling holes in metal smoothly. ... show more
Reviewed in the United States on October 5, 2023 by E. Edwards

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