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IRWIN

IRWIN Tools Black Oxide Countersink Drill Bit, 5-Piece Set (1877791)

    • Based on 1,008 reviews
Condition: New
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Availability: In Stock.
Fulfilled by Amazon
Arrives Saturday, Nov 23
Order within 2 hours and 43 minutes
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Features

  • Made from industrial grade High-Speed Steel for increased durability. Black oxide finish adds corrosion resistance.
  • Five-flute design reduces vibration for smoother drilling and extended bit life.
  • Precision-ground 82-degree tip drills countersink holes into most machinable metals, as well as wood and plastic.
  • 1/4-inch round shank fits all handheld and stationary drills.

Description

Made from industrial grade High-Speed Steel for increased durability. Black oxide finish adds corrosion resistance. Five-flute design reduces vibration for smoother drilling and extended bit life. Precision-ground 82-degree tip drills countersink holes into most machinable metals, as well as wood and plastic. 1/4-inch round shank fits all handheld and stationary drills. IRWIN Tools Black Oxide Countersink Drill Bit, 5-Piece Set (1877791).

Material: Blend


Finish Type: Black Oxide


Shank Type: Round


Cutting Angle String: 82 Degrees


Brand: IRWIN


Material: ‎Blend


Finish Type: ‎Black Oxide


Shank Type: ‎Round


Cutting Angle String: ‎82 Degrees


Brand: ‎IRWIN


Item Dimensions LxWxH: ‎1 x 4.63 x 5.25 inches


Tool Flute Type: ‎Spiral


Surface Recommendation: ‎Alloy Steel


Manufacturer: ‎IRWIN


Part Number: ‎1877791


Item Weight: ‎2.24 ounces


Product Dimensions: ‎1 x 4.63 x 5.25 inches


Country of Origin: ‎China


Item model number: ‎1877791


Is Discontinued By Manufacturer: ‎No


Size: ‎One Size


Color: ‎Multicolor


Finish: ‎Black Oxide


Item Package Quantity: ‎1


Measurement System: ‎Inch


Included Components: ‎(5) Countersink Bits sizes 1/4", 3/8", 1/2", 5/8" and 3/4"


Batteries Included?: ‎No


Batteries Required?: ‎No


Date First Available: July 7, 2014


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Saturday, Nov 23

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

To initiate a return, please visit our Returns Center.

View our full returns policy here.

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  • Financing through Apple Pay
Leasing options through Acima may also be available during checkout.

Learn more about financing & leasing here.

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Top Amazon Reviews

    • Countersink bits that will last a long time
Review Image by Shutterbug Guy Shutterbug Guy
I have used an Irwin 5/8" countersink like the one in this set for 30 years. It has held up well. I wanted a set with various sizes, and appreciate that the quality seems the same as the one I purchased 30 years ago. I wish that this came in a plastic storage container to keep these organized. As shown in my photo, it comes in a sealed plastic clamshell package that I did cut open on three sides to use as for storing the 5-piece set. The clamshell would work nicely for this if it weren't heat-sealed on all the edges, but it's hard to retain the snap-together functionality of the clamshell when most of the sealed edge has to be cut away. Overall, a nice quality Counterink Bit set that will last a long time. After I ordered this set, I realized that there is another version available that come in a plastic storage case. Consider that version if the storage case would be useful. ... show more
Reviewed in the United States on September 29, 2023 by Shutterbug Guy Shutterbug Guy
    • Work as described by manufacturer.
Good bits would purchase again.
Reviewed in the United States on October 26, 2023 by Frank Arena
    • A nice set of tools, very sharpNice Product for Wood or Plastic Work..
I have used only two of the Counter Sinks so far but they are sharp and work flawlessly ! They are what I have come to expect from IRWIN. PROS: Well made. High Quality. Sharp as expected. CONS: None Overall: Nice tool set ! Work well on wood and plastic.
Reviewed in the United States on August 23, 2023 by RedRanger
    • Decent
Pretty decent. I just wish it came with a case or a box (just a flimsy plastic package it came with, which is not very good).
Reviewed in the United States on July 21, 2023 by B.K.
    • The IRWIN quality I grew to know. Nice value.
I have Erwin cutting tools that I’ve used for years and was able to re-sharpen and reuse. So when I saw the deal on Amazon, I jumped at it. These were made in China, but it appeared to have the same quality and performance that I was used to with the Irwin products made in the United States. That’s not saying they’re going to be the same and hold up as well, but I noticed the quality was there and the sharpness also was there. When I used them, they performed well to so it appears even though they’re made in China they have standards set by Irwin like what the products are made in the US so far so good ... show more
Reviewed in the United States on February 22, 2023 by booboo
    • Irwin
These irwin countersink bits are made of good material and are sharp. The sizes are the most common, which is a good selection for a first time buyer as myself. I know Irwin tools are always good quality and well made. So it was an easy decision to purchase these and save at least 40% off compared to other retailers. ... show more
Reviewed in the United States on February 10, 2023 by Vinnieman
    • affordable Countersink Drill bits
Seem to work as expected. Shanks a bit short but overall a good buy.
Reviewed in the United States on February 24, 2023 by Larry Borgione
    • I like them
So far, so good. I use them for wood and occasionally for Aluminum, and so far they're holding up great.
Reviewed in the United States on March 31, 2023 by T.T.

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