---
product_id: 81905325
title: "Flap Disc, Zirconia, 4-1/2-Inch x 7/8-Inch, 80-Grit (DW8309)"
brand: "dewalt"
price: "€ 16.98"
currency: EUR
in_stock: true
url: https://www.desertcart.nl/products/81905325-flap-disc-zirconia-4-1-2-inch-x-7-8
store_origin: NL
region: Netherlands
---

# 15X longer abrasive life 3X faster material removal 20-25° optimal grinding angle Flap Disc, Zirconia, 4-1/2-Inch x 7/8-Inch, 80-Grit (DW8309)

**Brand:** dewalt
**Price:** € 16.98
**Availability:** ✅ In Stock

## Summary

> ⚡ Grind faster, last longer, work smarter.

## Quick Answers

- **What is this?** Flap Disc, Zirconia, 4-1/2-Inch x 7/8-Inch, 80-Grit (DW8309) by dewalt
- **How much does it cost?** € 16.98 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.nl](https://www.desertcart.nl/products/81905325-flap-disc-zirconia-4-1-2-inch-x-7-8)

## 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

- • **Built for Pros:** Engineered by DEWALT, trusted by professionals who demand durability and speed.
- • **Precision Grind:** Type 29 fiberglass backing ensures a perfect 20-25° grinding angle for superior control and finish.
- • **Compact Powerhouse:** 4-1/2 inch diameter fits most angle grinders for versatile, on-the-go performance.
- • **Endurance Champion:** Premium abrasive cloth lasts up to 15X longer than standard discs—less downtime, more productivity.
- • **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 cutting-edge abrasive technology with a durable fiberglass backing to deliver 3X faster material removal and up to 15X longer life than traditional sanding discs. Designed for precision and endurance, it’s the go-to choice for professionals seeking efficient, high-quality grinding performance.

## Description

Flap Disc, Zirconia, 4-1/2-Inch x 7/8-Inch, 80-Grit (DW8309)

## 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 grinding angle of 20-25 degrees

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Manufacturer | Dewalt |
| Part number | DW8309 |
| Item Weight | 45.4 g |
| Item model number | DW8309 |
| Size | Pack of 1 |
| Colour | Multi |
| Style | 80G 7/8-Inch Hub |
| Finish | Brushed |
| Material | Blend |
| Pattern | Solid |
| Shape | Rectangular |
| Item thickness | 4.5 Inches |
| Power source type | Hand Powered |
| Item Package Quantity | 1 |
| Cutting Diameter | 4.5 Inches |
| Measurement System | Metric |
| Grit Number | 80 |
| Grit Description | Medium |
| Included components | 4-1/2" x 7/8" 80 Grit Zirconia Flap Disc |
| Batteries included? | No |
| Batteries Required? | No |
| Item diameter | 4.5 Inches |

## Product Details

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

## Images

![Flap Disc, Zirconia, 4-1/2-Inch x 7/8-Inch, 80-Grit (DW8309) - Image 1](https://m.media-amazon.com/images/I/711wzPIMwuL.jpg)
![Flap Disc, Zirconia, 4-1/2-Inch x 7/8-Inch, 80-Grit (DW8309) - Image 2](https://m.media-amazon.com/images/I/711wzPIMwuL.jpg)
![Flap Disc, Zirconia, 4-1/2-Inch x 7/8-Inch, 80-Grit (DW8309) - Image 3](https://m.media-amazon.com/images/I/711wzPIMwuL.jpg)
![Flap Disc, Zirconia, 4-1/2-Inch x 7/8-Inch, 80-Grit (DW8309) - Image 4](https://m.media-amazon.com/images/I/812cjSwUWFL.jpg)

## Available Options

This product comes in different **Style** options.

## 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.

## 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 Netherlands*
*Store origin: NL*
*Last updated: 2026-03-08*