SKU: 56226152540

IRWIN Step Drill Bit. 1/8-Inch to 1/2-Inch Step. 1/4-Inch Shank (10231)

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Description

IRWIN Step Drill Bit. 1/8-Inch to 1/2-Inch Step. 1/4-Inch Shank (10231)Irwin 10231 Unibit #1 13 Step 1 4 Inch Step Drill Bit. 1 32 inch Steps (1 8 to 1 2 inches) Save time by eliminating the need to change drills when drilling round holes in thin materials. Each smaller size drill also acts as a pilot for the next size. Patented single flute cutting edge gives greater control through steps and a true round hole every time. Ideal for drilling holes into thin materials such as stainless steel. copper. brass. aluminum.

Irwin 10231 Unibit #1 13-Step 1/4-Inch Step Drill Bit. 1/32-inch Steps (1/8- to 1/2- inches) Save time by eliminating the need to change drills when drilling round holes in thin materials. Each smaller size drill also acts as a pilot for the next size. Patented single-flute cutting edge gives greater control through steps and a true round hole every time. Ideal for drilling holes into thin materials such as stainless steel. copper. brass. aluminum. plastic and laminates. SpeedPoint tip penetrates faster than previous Unibits and prevents walking. 3-faltted hex shank prevents slipping in drill chuck. Drill diameters etched in flute for easy identification.

From the Manufacturer

UNIBIT 1 13 Hole Sizes (1/8"-1/2"). 1/32" Increments

Features

  • This product is easy to use

  • This product is highly durable

  • This product is manufactured in United States

  • Save time because you don't need to change drills for different-sized round holes in thin materials. Each drill acts as a pilot for the next size.

  • Patented single-flute cutting edge gives greater control through steps and a true round hole every time.

  • Ideal for drilling holes into thin materials such as stainless steel. copper. brass. aluminum. plastic and laminates.

  • Speed Point tip penetrates faster than previous Unibits and prevents walking. 3-faltted hex shank prevents slipping in drill chuck.

  • Drill diameters etched in flute for easy identification.

  • Save time because you don't need to change drills for different-sized round holes in thin materials. Each drill acts as a pilot for the next size.

  • Patented single-flute cutting edge gives greater control through steps and a true round hole every time.

  • Ideal for drilling holes into thin materials such as stainless steel. copper. brass. aluminum. plastic and laminates.

  • SpeedPoint tip penetrates faster than previous Unibits and prevents walking. 3-faltted hex shank prevents slipping in drill chuck.

  • Drill diameters etched in flute for easy identification.

Specifications

Part Number : 10231

Item Weight : 1.6 ounces

Product Dimensions : 6 x 2.9 x 0.8 inches

California residents : Click here for Proposition 65 warning

Item model number : 10231

Size : 1/2 inches

Color : Silver|Silver metallic

Finish : Black Oxide

Material : High Speed Steel

Item Package Quantity : 1

Cutting Diameter : 3 inches

Tool Tip Description : 118 Degree

Measurement System : Fractional

Included Components : Power Tool Accessories. Drill Bits & Accessories. Step Drill Bits

Batteries Included? : No

Batteries Required? : No

Warranty Description : Manufacturer

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 56226152540

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4.3 ★★★★★
Based on 27 reviews
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Product Reviews
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Verified Purchase
Leasa Segura
Louisville, US
★★★★★ 5
Modern Farmhouse Towel Rack
Beautiful. Sturdy. Shelves have enough depth to be useful. Would buy again. Great price.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on June 27, 2025
D
Verified Purchase
Deborah
Bozeman, US
★★★★★ 5
Pretty good quality.
Size: 32in-Shelves, Size: 32in-Shelves
My husband and put this together and hung pretty easily. Instructions are clear. It helps to have a drill bit. Good quality, good look.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on July 13, 2025
D
Verified Purchase
Darrell Daniel
Natrona Heights, US
★★★★★ 4
Looks good but the wall anchors is TRASH!
Size: 3-tier shelves, Size: 3-tier shelves
The product is heavy and sturdy once you get it up completely. The issue I have is with the instructions... 1. The 5/16 drill bit is recommends is WAY TO BIG. The Anchors it comes with will slip right through. The screws that is comes with are WAY TO SMALL for the weight. I recommend getting better ones from the hardware store and painting the screws black for better aesthetics. 2. The instructions say to put it together first then hang it on the wall. That is great so you can see where you want to place it and because it is actually bigger than it looks, but you will need to de-assemble it from the bottom shelf down after you mark where you want to place it, then put that part on the wall, then reassemble it from there, securing the top part to the wall last. The instructions sucked but that is what worked best for me. Another thing is when you first assembling it, you will notice that you will have to unscrew it a bit so the pipes can fast the correct way. This will make it feel flimsy, but it will tighten up when you secure it to the wall. Also, like some people said in previous reviews, some of the black paint did peel off the pipes, not to much for me but it was noticeable if you look at it hard enough.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on June 21, 2023
E
Verified Purchase
Eileen
Massapequa, US
★★★★★ 5
Love the look of these
Size: 24in-Shelve
I love the look of these. Bought for towel storage over my toilet. They look really classy and I'm so happy with them. However, its important to note that the wall anchors they provide are way too big for the screws. The screws just fall into the inside of the anchor without even being screwed in. So there's no way you could secure the wall unit with the ones provided. We had to replace the anchors with some I already had. Other than that very happy with the quality and look.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on January 10, 2025
M
Verified Purchase
Marlaina Hoerr
Lexington, US
★★★★★ 5
Great shelf
Size: 24in-Shelve
I’m a fan! Good quality, sturdy shelf, very easy to assemble and put on the wall. I recommend having a second person to help hold the shelf while you get the first few screws in, just to keep it level. I love the larger shelf space, it gives me a lot more storage for the bathroom.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on September 10, 2025

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