--- product_id: 708252852 title: "DEWALT DW8309 4-1/2\" x 7/8\" 80 Grit Zirconia Angle Grinder Flap Disc" brand: "dewalt" price: "$149.87" currency: USD in_stock: true reviews_count: 5 category: "Dewalt" url: https://www.desertcart.us/products/708252852-dewalt-dw8309-4-1-2-x-7-8-80-grit store_origin: US region: United States of America --- # 15X longer abrasive life 3X faster material removal Optimal 10-25° grinding angle DEWALT DW8309 4-1/2" x 7/8" 80 Grit Zirconia Angle Grinder Flap Disc **Brand:** dewalt **Price:** $149.87 **Availability:** ✅ In Stock ## Summary > ⚡ Grind faster, last longer, finish sharper — own the edge of excellence! ## Quick Answers - **What is this?** DEWALT DW8309 4-1/2" x 7/8" 80 Grit Zirconia Angle Grinder Flap Disc by dewalt - **How much does it cost?** $149.87 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/708252852-dewalt-dw8309-4-1-2-x-7-8-80-grit) ## 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 - • **Trusted by Pros:** DEWALT’s DW8309 boasts a 4.8-star rating from over 1,100 users—join the elite who demand the best. - • **Compact Yet Mighty:** Lightweight 45g design fits perfectly on any 4-1/2" angle grinder for ultimate control and comfort. - • **Speed Meets Precision:** Zirconia grit delivers 3X faster material removal to power through projects with ease. - • **Endurance That Outlasts:** Premium abrasive cloth lasts up to 15X longer, reducing downtime and replacement costs. - • **Engineered for Perfect Angles:** Type 29 fiberglass backing ensures a 10-25° grinding angle for flawless finishes without marring. ## Overview The DEWALT DW8309 4-1/2" x 7/8" 80 Grit Zirconia Angle Grinder Flap Disc combines zirconia grit for 3X faster material removal with a premium abrasive cloth that lasts 15X longer than traditional discs. Its Type 29 fiberglass backing provides an optimal 10-25° grinding angle, ensuring efficient use and a smooth finish without damaging your workpiece. Lightweight and highly rated, this disc is engineered for professionals who demand speed, durability, and precision. ## Description DEWALT DW8309 4-1/2 x 7/8 80 grit Zirconia angle Grinder flap disc. ## 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 | | Brand | DEWALT | | Brand Name | DEWALT | | Compatible Devices | Angle Grinder | | Construction Type | Grinding | | Customer Reviews | 4.8 out of 5 stars 1,190 Reviews | | Global Trade Identification Number | 00028877310459 | | Grit Material | Zirconia | | Grit Material Type | Zirconia | | Grit Number | 80 | | Industry Standard Identifier | Type 29 | | Item Diameter | 4.5 Inches | | Item Dimensions | 11.4 x 11.4 x 2.3 Centimeters | | Item Dimensions L x W | 11.4L x 11.4W Centimeters | | Item Thickness | 0.88 Inches | | Item Type Name | 4-1/2 X 7/8 80G T29 HP FLAP | | Item Weight | 45 g | | Manufacturer | DeWalt | | Material Type | Blend | | Model Number | DW8309 | | Number of Items | 1 | | Part Number | DW8309 | | Product Dimensions | 11.4L x 11.4W Centimeters | | Recommended Uses For Product | Grinding | | UPC | 028877310459 | | Unit Count | 1.0 Count | | Whats in the box? | 4-1/2" x 7/8" 80 Grit Zirconia Flap Disc | ## Product Details - **Grit Material:** Zirconia - **Product Dimensions:** 11.4L x 11.4W Centimeters - **Brand:** DEWALT - **Compatible Devices:** Angle Grinder - **Item Thickness:** 0.88 Inches ## Images ![DEWALT DW8309 4-1/2" x 7/8" 80 Grit Zirconia Angle Grinder Flap Disc - Image 1](https://m.media-amazon.com/images/I/81VZYw13RkL.jpg) ![DEWALT DW8309 4-1/2" x 7/8" 80 Grit Zirconia Angle Grinder Flap Disc - Image 2](https://m.media-amazon.com/images/I/91JbqCkI6eL.jpg) ![DEWALT DW8309 4-1/2" x 7/8" 80 Grit Zirconia Angle Grinder Flap Disc - Image 3](https://m.media-amazon.com/images/I/315AbeUu4wL.jpg) ![DEWALT DW8309 4-1/2" x 7/8" 80 Grit Zirconia Angle Grinder Flap Disc - Image 4](https://m.media-amazon.com/images/I/812cjSwUWFL.jpg) ## Available Options This product comes in different **Size, 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. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Review *by B***O on 23 June 2023* ### ⭐⭐⭐⭐⭐ Review *by M***T on 4 August 2025* ### ⭐⭐⭐⭐⭐ Review *by J***E on 25 April 2019* ## 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) --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.us/products/708252852-dewalt-dw8309-4-1-2-x-7-8-80-grit](https://www.desertcart.us/products/708252852-dewalt-dw8309-4-1-2-x-7-8-80-grit) --- *Product available on Desertcart United States of America* *Store origin: US* *Last updated: 2026-04-26*