---
product_id: 612789790
title: "Serious Grit - 3.5-Inch (90mm) 7-Hole Sanding Discs Assortment - 80, 120, 150, 180, 220 Grit (10 of Each) - Fits Festool Rotex RO 90 - Heavy-Duty Hook & Loop Velcro-Backed Film Discs - 50 Pack Box"
brand: "serious grit"
price: "€ 3.93"
currency: EUR
in_stock: false
url: https://www.desertcart.nl/products/612789790-serious-grit-3-5-inch-90mm-7-hole-sanding-discs
store_origin: NL
region: Netherlands
---

# Heat-treated zinc stearate anti-clog coating Heavy-duty tear-resistant polyester film backing 7-hole 3.5-inch fit for Festool RO 90 Serious Grit - 3.5-Inch (90mm) 7-Hole Sanding Discs Assortment - 80, 120, 150, 180, 220 Grit (10 of Each) - Fits Festool Rotex RO 90 - Heavy-Duty Hook & Loop Velcro-Backed Film Discs - 50 Pack Box

**Brand:** serious grit
**Price:** € 3.93
**Availability:** ❌ Out of Stock

## Summary

> ⚡ Elevate your sanding game with Serious Grit – where precision meets durability!

## Quick Answers

- **What is this?** Serious Grit - 3.5-Inch (90mm) 7-Hole Sanding Discs Assortment - 80, 120, 150, 180, 220 Grit (10 of Each) - Fits Festool Rotex RO 90 - Heavy-Duty Hook & Loop Velcro-Backed Film Discs - 50 Pack Box by serious grit
- **How much does it cost?** € 3.93 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.nl](https://www.desertcart.nl/products/612789790-serious-grit-3-5-inch-90mm-7-hole-sanding-discs)

## Best For

- serious grit enthusiasts

## Why This Product

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

## Key Features

- • **Wet & Dry Ready:** Premium film discs excel in both wet and dry sanding applications, ideal for woodworking, auto body, and more.
- • **Unmatched Durability:** Polyester film backing resists tearing and fraying, even on tough edges and corners.
- • **Versatile Grit Range:** Includes 80, 120, 150, 180, and 220 grits—perfect for everything from aggressive material removal to ultra-smooth finishing.
- • **Stay-Clean Performance:** Proprietary anti-clog coating keeps dust at bay, maximizing sanding efficiency and disc lifespan.
- • **Precision Fit for Festool RO 90:** Seamlessly compatible with your 90mm random orbital sander for flawless sanding sessions.

## Overview

Serious Grit’s 3.5-inch, 7-hole sanding discs are engineered for Festool RO 90 orbital sanders, featuring a heavy-duty polyester film backing and heat-treated anti-clog coating. This 50-pack assortment spans five essential grits (80-220), delivering superior durability, dust resistance, and a swirl-free finish for professional-grade sanding on wood, metal, drywall, and painted surfaces.

## Description

Serious Grit's 3.5" (90mm) 7-Hole hook and loop sanding discs are the perfect match for your Festool Rotex RO 90 sander. With their high quality film construction, durable hook and loop backing, and proprietary zinc stearate anti-clog coating, these discs won't let you down in your shop. Featuring a range of grits from 40 - 320 and an variety box option containing 80-320, Serious Grit will help you get the job done. This has been one of our most requested sizes from our loyal fan base and we're thrilled to finally offer them for sale.

## Features

- FITS FESTOOL RO 90 – Serious Grit 3.5-Inch, 7-Hole assorted grit hook & loop sanding discs are compatible with the Festool Rotex RO90 90mm random orbital sander. These sanding discs are ideal for sanding all surfaces, including wood, metal, drywall, epoxy, and painted surfaces.
- VELCRO-BACKED FILM DISCS – Our discs are constructed with a heavy-duty polyester film backing material between the aluminum oxide abrasive grain and the velcro. This premium material creates a stronger disc, with more effective heat dissipation, and a better finish. These wet/dry discs are perfect for woodworking, auto body work including paint removal and wet sanding, and more.
- MORE DURABLE – Our sanding discs are made with polyester film construction which makes them nearly impossible to tear. No more frayed or torn edges when sanding around corners.
- LESS CLOGGING – Our proprietary heat-treated zinc stearate anti-clog coating sheds dust before it has a chance to clog up your disc, making these sandpaper discs virtually dust free when paired with a dust extractor or vacuum system.
- SMOOTHER FINISH – The film construction creates a flatter, stronger disc that produces a better finish vs paper, mesh, or net sanding discs. With our anti-clog coating, the entire surface area of the disc stays effective longer, which improves cutting power and leads to a more consistent swirl-free finish.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Brand | Serious Grit |
| Manufacturer | Serious Grit |
| Number of Memory Sticks | 50 |
| Item Weight | 191 g |
| Product Dimensions | 8.89 x 8.89 x 0.25 cm; 191 g |
| Item part number | SG-90C-MG |
| Item Height | 0.25 Centimeters |
| Item Width | 3.5 Inches |
| Compatible Device | Orbital Sander |
| Included Components | sandpaper |
| Are batteries included? | No |

## Product Details

- **Brand:** Serious Grit
- **Compatible Devices:** Orbital Sander
- **Grit Number:** 90
- **UPC:** 850053215230
- **Manufacturer:** Serious Grit

## Images

![Serious Grit - 3.5-Inch (90mm) 7-Hole Sanding Discs Assortment - 80, 120, 150, 180, 220 Grit (10 of Each) - Fits Festool Rotex RO 90 - Heavy-Duty Hook & Loop Velcro-Backed Film Discs - 50 Pack Box - Image 1](https://m.media-amazon.com/images/I/81dTn9UuxrL.jpg)
![Serious Grit - 3.5-Inch (90mm) 7-Hole Sanding Discs Assortment - 80, 120, 150, 180, 220 Grit (10 of Each) - Fits Festool Rotex RO 90 - Heavy-Duty Hook & Loop Velcro-Backed Film Discs - 50 Pack Box - Image 2](https://m.media-amazon.com/images/I/81SwOQCKBtL.jpg)
![Serious Grit - 3.5-Inch (90mm) 7-Hole Sanding Discs Assortment - 80, 120, 150, 180, 220 Grit (10 of Each) - Fits Festool Rotex RO 90 - Heavy-Duty Hook & Loop Velcro-Backed Film Discs - 50 Pack Box - Image 3](https://m.media-amazon.com/images/I/81cMdP7k5FL.jpg)
![Serious Grit - 3.5-Inch (90mm) 7-Hole Sanding Discs Assortment - 80, 120, 150, 180, 220 Grit (10 of Each) - Fits Festool Rotex RO 90 - Heavy-Duty Hook & Loop Velcro-Backed Film Discs - 50 Pack Box - Image 4](https://m.media-amazon.com/images/I/81zXJiY+0-L.jpg)
![Serious Grit - 3.5-Inch (90mm) 7-Hole Sanding Discs Assortment - 80, 120, 150, 180, 220 Grit (10 of Each) - Fits Festool Rotex RO 90 - Heavy-Duty Hook & Loop Velcro-Backed Film Discs - 50 Pack Box - Image 5](https://m.media-amazon.com/images/I/81ksfFsu6aL.jpg)

## Frequently Bought Together

- Serious Grit - 3.5-Inch (90mm) 7-Hole Sanding Discs Assortment - 80, 120, 150, 180, 220 Grit (10 of Each) - Fits Festool Rotex RO 90 - Heavy-Duty Hook & Loop Film Discs - 50 Pack Box
- Serious Grit - 3.5-Inch (93mm) Triangle Sanding Sheet Assortment - 80, 120, 150, 180, 220 Grit (10 of Each) - Fits Festool Rotex RO 90 Delta - Hook & Loop Sandpaper for Detail Sanders - 50 Pack Box
- Festool 576263 3-1/2-Inch (90mm) Random Orbital Multi-Mode Sander ROTEX RO 90 DX FEQ-Plus

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*Product available on Desertcart Netherlands*
*Store origin: NL*
*Last updated: 2026-01-22*