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IRWIN

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

  • Based on 1,176 reviews
Condition: New
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Availability: In Stock.
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Arrives Saturday, Dec 27
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Features

  • Precision-ground 82 tip for countersinking into most machinable metals, wood or plastic
  • Made from industrial grade high speed steel for increased durability
  • Includes a black oxide finish for added corrosion resistance
  • Five flute design reduces vibration for smoother drilling and extended life
  • 1/4" round shank fits all handheld and stationary drills

Description

IRWIN High Speed Steel Countersinks feature a precision- ground 82-degree tip that makes them ideal for countersinking into most machinable metals. They're made from industrial grade high speed steel for increased durability and they include a black oxide finish for added corrosion resistance. The five flute design reduces vibration for smoother drilling and extended life. Plus, the 1/4" round shank fits all handheld and stationary drills. From the Manufacturer IRWIN High Speed Steel Countersinks feature a precision-ground 82-degree tip that makes them ideal for countersinking into most machinable metals. They're made from industrial grade high speed steel for increased durability, and they include a black oxide finish for added corrosion resistance. The five flute design reduces vibration for smoother drilling and extended life. Plus, the 1/4" round shank fits all handheld and stationary drills.

Material: High Speed Steel (HSS)


Finish Type: Brushed


Shank Type: Round


Cutting Angle String: 82 Degrees


Brand: IRWIN


Material: ‎High Speed Steel (HSS)


Finish Type: ‎Brushed


Shank Type: ‎Round


Cutting Angle String: ‎82 Degrees


Brand: ‎IRWIN


Item dimensions L x W x H: ‎1 x 4.63 x 5.25 inches


Tool Flute Type: ‎Spiral


Point Style: ‎Center Point


Surface Recommendation: ‎Alloy Steel


Number of Flutes: ‎5


UPC: ‎733169385489 042526917189


Set Name: ‎5-Piece Set


Unit Count: ‎1.0 Count


Global Trade Identification Number: ‎89


Manufacturer: ‎IRWIN


Number of Pieces: ‎5


Part Number: ‎1877791


Item Weight: ‎2.24 ounces


Product Dimensions: ‎1 x 4.63 x 5.25 inches


Item model number: ‎1877791


Is Discontinued By Manufacturer: ‎No


Size: ‎One Size


Color: ‎Multicolor


Style: ‎Classic


Finish: ‎Brushed


Pattern: ‎Solid


Shape: ‎Rectangular


Power Source: ‎Hand_powered


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, Dec 27

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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Learn more about financing & leasing here.

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Top Amazon Reviews

    • Good product
Exactly what I needed. Worked well.
Reviewed in the United States on July 6, 2025 by Amazon Customer
    • Great Tool and a good value
Great countersinks - they do just what they are advertised to do quickly, smoothly, and with no unevenness or chipping rough edges.
Reviewed in the United States on February 18, 2025 by Amazon Customer
    • 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
    • Satisfied
Im using it on light weight material and works for me
Reviewed in the United States on July 5, 2025 by Amazon Customer
    • 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
    • Works great
So far so good, only have used them on aluminum and plastic so far.
Reviewed in the United States on June 30, 2025 by W Brack
    • Reasonably priced kit
These countersink work great. Sharp and cut fast.
Reviewed in the United States on October 28, 2024 by A...gamer
    • Slick Countersink Bits
Review Image by KJ KJ
Amazing Bits great for any project. Easily hide your screws of all standard sizes and shapes.
Reviewed in the United States on February 16, 2025 by KJ KJ

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