---
product_id: 394262534
title: "DEWALT Flap Disc, Zirconia, 4-1/2-Inch x 7/8-Inch, 80-Grit (DW8309)"
brand: "dewalt"
price: "€ 40.46"
currency: EUR
in_stock: true
reviews_count: 6
category: "Dewalt"
url: https://www.desertcart.sk/products/394262534-dewalt-flap-disc-zirconia-4-1-2-inch-x-7
store_origin: SK
region: Slovakia
---

# 15X longer abrasive life 3X faster material removal Optimal 10-25° grinding angle DEWALT Flap Disc, Zirconia, 4-1/2-Inch x 7/8-Inch, 80-Grit (DW8309)

**Brand:** dewalt
**Price:** € 40.46
**Availability:** ✅ In Stock

## Summary

> ⚡ Grind smarter, not harder—unleash pro-level speed and durability!

## Quick Answers

- **What is this?** DEWALT Flap Disc, Zirconia, 4-1/2-Inch x 7/8-Inch, 80-Grit (DW8309) by dewalt
- **How much does it cost?** € 40.46 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.sk](https://www.desertcart.sk/products/394262534-dewalt-flap-disc-zirconia-4-1-2-inch-x-7)

## Best For

- dewalt enthusiasts

## Why This Product

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

## Key Features

- • **Compact Powerhouse:** 4-1/2 inch size fits most angle grinders, balancing control and aggressive material removal.
- • **Endurance Champion:** Premium abrasive cloth lasts up to 15X longer than standard discs—less downtime, more productivity.
- • **Precision Grinding:** Type 29 fiberglass backing ensures a perfect 10-25° angle for flawless finishes without marring.
- • **Versatile Performance:** Ideal for sharpening, grinding, and finishing—trusted by pros for consistent results.
- • **Turbocharged Efficiency:** Zirconia grit delivers 3X faster material removal—get the job done in record time.

## Overview

The DEWALT DW8309 4-1/2-inch Zirconia flap disc combines rapid 3X material removal with a premium abrasive cloth that lasts 15X longer than fiber resin discs. Its Type 29 fiberglass backing optimizes grinding angles between 10-25 degrees, ensuring efficient, precise work without damaging surfaces. Perfect for professionals seeking durable, high-performance grinding accessories.

## Description

DEWALT DW8309 4-1/2 x 7/8 80 grit Zirconia angle Grinder flap disc.

Review: Good - Good wheels, have lasted well and perform well
Review: Have only used once and they do a good job sharpening mower blades.

## Features

- Zirconia grit enables 3X faster material removal than fiber resin metal sanding discs
- Premium abrasive cloth provides up to 15 X longer life than fiber resin metal sanding discs
- Type 29 fiberglass backing provides optimal grinding angle of 10-25 degrees, allows full use of the disc, and won't mar the work piece

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B000BQO76Q |
| Best Sellers Rank | #95,665 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #19 in Flap Discs |
| Department | Unisex-Adult |
| Item model number | DW8309 |
| Manufacturer | DeWalt |
| Product Dimensions | 11.43 x 11.43 x 2.29 cm; 45.36 g |

## Product Details

- **Brand:** DEWALT
- **Compatible devices:** Angle Grinder
- **Grit material:** Zirconia
- **Grit type:** Medium
- **Product dimensions:** 11.4L x 11.4W centimeters

## Images

![DEWALT Flap Disc, Zirconia, 4-1/2-Inch x 7/8-Inch, 80-Grit (DW8309) - Image 1](https://m.media-amazon.com/images/I/315AbeUu4wL.jpg)
![DEWALT Flap Disc, Zirconia, 4-1/2-Inch x 7/8-Inch, 80-Grit (DW8309) - Image 2](https://m.media-amazon.com/images/I/41RbcRoJqNL.jpg)
![DEWALT Flap Disc, Zirconia, 4-1/2-Inch x 7/8-Inch, 80-Grit (DW8309) - Image 3](https://m.media-amazon.com/images/I/514p6T7dYzL.jpg)
![DEWALT Flap Disc, Zirconia, 4-1/2-Inch x 7/8-Inch, 80-Grit (DW8309) - Image 4](https://m.media-amazon.com/images/I/61IbGyr85OL.jpg)
![DEWALT Flap Disc, Zirconia, 4-1/2-Inch x 7/8-Inch, 80-Grit (DW8309) - Image 5](https://m.media-amazon.com/images/I/812cjSwUWFL.jpg)

## Questions & Answers

**Q: is it 4-1/2 x 1/4 x 7/8?  I notice it is only described as 4-1/2 x 7/8.  Pls help.  Tks**
A: Yes. 41/2 diameter x 1/4" thick with a 7/8" hole ( bore)

**Q: Is there an adapter to use on a 5/8 inch grinder**
A: should use same arbor back flange and securing nut as an ordinary grinding wheel without threaded arbor, usually comes with grinder

**Q: I want to shave a door down about 3/8 inch.  Would this work for the job?**
A: mostly, this is used for grinding metals. To cut 3/8" wood, you need a saw not a grinder.
Thanks

**Q: OK for glazed tile?**
A: I think it you used it with a variable speed grinder at the slowest speed it would work for cleaning up the edges. For glass I just use a random orbital electric sander with 100 grit, since glaze is essentially glass, I would use caution on a rough grit.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Good
*by P***T on 5 November 2025*

Good wheels, have lasted well and perform well

### ⭐⭐⭐⭐⭐ Review
*by B***O on 23 June 2023*

Have only used once and they do a good job sharpening mower blades.

### ⭐⭐⭐⭐⭐ Review
*by M***T on 4 August 2025*

This flap disc is the real deal. DEWALT slapped some zirconia grit on a wheel and basically handed you a surface-smoothing weapon of mass reduction. Whether you’re cleaning up welds, smoothing edges, or shaving down that "oops" cut you swore was straight—this thing handles it like a champ. Durability? Let’s just say it outlasted my attention span and my playlist. It cuts smooth, runs cool, and doesn’t shred itself to pieces halfway through a job like those bargain-bin brands. Put it on your grinder and let it work its magic. You’ll be turning rough steel into buttered toast in no time.

## Frequently Bought Together

- DEWALT Flap Disc, Zirconia, 4-1/2-Inch x 7/8-Inch, 80-Grit (DW8309)
- DEWALT 4-1/2 Inch Cut-Off Wheel, Angle Grinder Cutting Disc, General Purpose, 5-Pack (DW8062B5)
- DEWALT Diamond Blade for Masonry, Dry Cutting, Continuous Rim, 7/8-Inch Arbor, 4-1/2-Inch (DW4725)

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*Product available on Desertcart Slovakia*
*Store origin: SK*
*Last updated: 2026-01-29*