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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4.6 ★★★★★
Based on 26 reviews
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Verified Purchase
Carol
Draper, US
★★★★★ 4
Where’s the owners manual?
I really like this. The only drawback is that there is no owners manual!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 4, 2026
M
Verified Purchase
mary
West Palm Beach, US
★★★★★ 1
poor purchase
It only lasted 2 mo before it quit working
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Reviewed in the United States on May 24, 2026
W
William Paul McInnis
Carnegie, US
★★★★★ 5
Clean teeth, smart features, and convenient to use!
I’ve gone through a few electric toothbrushes over the years, and this one stands out mostly because of how practical it is day to day. The cleaning power is solid, my teeth feel noticeably smoother after each use, especially along the gumline. The different modes are useful, I mostly stick to the standard clean mode, but the sensitive option is great when my gums feel a little irritated. The built in UV sanitizing and drying feature is something I didn’t think I needed, but now I appreciate it. It’s nice knowing the brush head isn’t just sitting there wet between uses. The included rinse cup and storage setup make everything feel more organized on the counter, which is a small but real upgrade. Battery life has been reliable so far, and the wireless charging base keeps things simple. It also comes with multiple brush heads, which adds value, especially if you plan to stick with it long term.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 19, 2026
R
Rachel Smith
Charlottesville, US
★★★★★ 4
Cleans your teeth!
This is my first experience with an electric toothbrush. I was a little confused with how to charge this but you need to take out the cup and plug it into that spot. So it’s nice that it comes with a cup but it does go in the charging spot. The UV disinfectant and dryer is very cool indeed. I can’t tell what the difference is in all the different settings. The toothbrush does a really good job of cleaning and you can feel your teeth clean even for a while after you brush. You should put it in your mouth first before you turn it on or else you’ll spray toothpaste all over the place. Overall this was a good foray into electronic toothbrushing for me. I don’t think it’s the top quality as some of the name brands but it works and gets the job done. I love that it comes with replacement heads.
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Reviewed in the United States on April 5, 2026
M
MC
Omaha, US
★★★★★ 5
JTF Sonic Electric Toothbrush with UV Sanitizing & Drying: 5 Modes for Effective
Super cute, comes with lots of replacement heads. The sanitizing slot is really cool and makes everything feel extra clean.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 25, 2026

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