---
product_id: 17176119
title: "IRWIN IRWIN Tools 1877791 Black Oxide Countersink Drill Bit, 5-Piece Set"
brand: "irwin"
price: "9159 kr"
currency: ISK
in_stock: true
reviews_count: 13
category: "Irwin"
url: https://www.desertcart.is/products/17176119-irwin-irwin-tools-1877791-black-oxide-countersink-drill-bit-5
store_origin: IS
region: Iceland
---

# 5-flute vibration reduction 82° precision tip Black oxide corrosion resistance IRWIN IRWIN Tools 1877791 Black Oxide Countersink Drill Bit, 5-Piece Set

**Brand:** irwin
**Price:** 9159 kr
**Availability:** ✅ In Stock

## Summary

> 🔧 Elevate your craft with precision that professionals trust!

## Quick Answers

- **What is this?** IRWIN IRWIN Tools 1877791 Black Oxide Countersink Drill Bit, 5-Piece Set by irwin
- **How much does it cost?** 9159 kr with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.is](https://www.desertcart.is/products/17176119-irwin-irwin-tools-1877791-black-oxide-countersink-drill-bit-5)

## Best For

- irwin enthusiasts

## Why This Product

- Trusted irwin brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Five-Flute Design:** Minimizes vibration for smoother drilling and extended bit lifespan.
- • **Black Oxide Finish:** Enhanced corrosion resistance keeps your tools sharp and reliable over time.
- • **Precision-Ground 82° Tip:** Engineered for flawless countersinking in metals, wood, and plastics.
- • **Universal 1/4" Round Shank:** Seamlessly fits all handheld and stationary drills for ultimate versatility.
- • **Industrial Grade High-Speed Steel:** Built to last with superior durability for professional-grade projects.

## Overview

The IRWIN 1877791 Black Oxide Countersink Drill Bit 5-Piece Set features a precision-ground 82-degree tip ideal for countersinking in metals, wood, and plastics. Crafted from industrial-grade high-speed steel with a black oxide finish, these bits offer enhanced durability and corrosion resistance. The innovative five-flute design reduces vibration for smoother operation and longer tool life, while the universal 1/4" round shank ensures compatibility with all handheld and stationary drills. Trusted by professionals for lasting performance and precision.

## Description

Product 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.

Review: 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 desertcart, 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
Review: Countersink bits that will last a long time - 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.

## 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

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B00LLGSZGS |
| Batteries Included? | No |
| Batteries Required? | No |
| Best Sellers Rank | #60,334 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #60 in Countersink Drill Bits |
| Brand | IRWIN |
| Color | Multicolor |
| Customer Reviews | 4.7 4.7 out of 5 stars (1,185) |
| Cutting Angle String | 82 Degrees |
| Date First Available | July 7, 2014 |
| Finish | Brushed |
| Finish Type | Brushed |
| Global Trade Identification Number | 00042526917189 |
| Included Components | (5) Countersink Bits sizes: 1/4", 3/8", 1/2", 5/8" and 3/4" |
| Is Discontinued By Manufacturer | No |
| Item Package Quantity | 1 |
| Item Weight | 2.24 ounces |
| Item dimensions L x W x H | 1 x 4.63 x 5.25 inches |
| Item model number | 1877791 |
| Manufacturer | IRWIN |
| Material | High Speed Steel (HSS) |
| Measurement System | Inch |
| Number of Flutes | 5 |
| Number of Pieces | 5 |
| Part Number | 1877791 |
| Pattern | Solid |
| Point Style | Center Point |
| Power Source | Hand_powered |
| Product Dimensions | 1 x 4.63 x 5.25 inches |
| Set Name | 5-Piece Set |
| Shank Type | Round |
| Shape | Rectangular |
| Size | One Size |
| Style | Classic |
| Surface Recommendation | Alloy Steel |
| Tool Flute Type | Spiral |
| UPC | 733169385489 042526917189 |
| Unit Count | 1.0 Count |

## Product Details

- **Brand:** IRWIN
- **Cutting Angle String:** 82 Degrees
- **Finish Type:** Brushed
- **Material:** High Speed Steel (HSS)
- **Shank Type:** Round

## Images

![IRWIN IRWIN Tools 1877791 Black Oxide Countersink Drill Bit, 5-Piece Set - Image 1](https://m.media-amazon.com/images/I/51H9zNxZ0kL.jpg)

## Questions & Answers

**Q: Will this work for structural tube 1/8" thick?**
A: Yes, IRWIN 1877791 is recommended for metal, plastic or wood applications.

**Q: Do these come in a storage box? I saw one review saying the packaging could be better.**
A: No, this does not include a storage box.

**Q: Is there a warranty on them?**
A: Thank you for choosing Irwin tools. Our goal is to provide the highest quality service. The product does have a limited lifetime warranty for the reasonable life of the tool covering them from any manufacturing defects. It does not cover for normal wear and tear of the item.

**Q: How long is the shank?**
A: 3/4 inch long shank

## Customer Reviews

### ⭐⭐⭐⭐⭐ The IRWIN quality I grew to know. Nice value.
*by B***O on February 22, 2023*

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

### ⭐⭐⭐⭐⭐ Countersink bits that will last a long time
*by S***Y on September 29, 2023*

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.

### ⭐⭐⭐⭐ Satisfied
*by A***R on July 5, 2025*

Im using it on light weight material and works for me

## Frequently Bought Together

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

*Product available on Desertcart Iceland*
*Store origin: IS*
*Last updated: 2026-02-22*