| SKU | 7100378716 |
|---|---|
| Legacy SKU | 60450003904 |
| UPC | 00068060066435 |
| Catalog Number | 37451 |
| Product Number | 521U |
3M Hookit Blue Abrasive Sheet Roll 521U is a paper-backed abrasive sheet roll with excellent performance and cut. It is available in a range of grades. The convenient sheet roll format can be sized as required.
- Excellent cut rate and performance
- E-weight paper backing is highly durable and withstands wear, pressure and damage
- Easy and reusable hook-and-loop system
- Convenient sheet roll form available in a variety of grades
Product Dimensions |
Imperial | Metric |
| Weight | 1.3541 lbs | |
|---|---|---|
| Width | 6-1/4 in | |
| Length | 6-1/4 in | |
| Height | 3 in |
Shipping Dimensions |
|
| Weight | 7.37 lb |
|---|---|
| Length | 16.25 in |
| Width | 6.8748 in |
| Height | 7.25 in |
| Color | Blue |
|---|
PRODUCT FAQ
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What kind of surfaces can I use the 3M™ Hookit™ Blue Sheet Roll 37451 on?
You can use this Blue Sheet Roll on a variety of surfaces, including metal, plastic, and wood. It's especially popular for automotive body work and sanding primer, filler, or old paint!
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How do I attach the sheet roll to my sanding tool?
Great question! The Hookit™ system features a hook-and-loop backing, so you simply press the sheet onto your Hookit™ sanding block or tool—it attaches securely and peels off easily when you're ready to change sheets.
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Is this roll reusable if I don’t use all of it at once?
Absolutely! You can cut just the amount you need for each job, then store the rest of the roll for future use. The hook-and-loop backing stays effective for multiple uses.
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What grit is this sheet roll and what’s it best for?
This specific product is 40E grit, which means it's a coarse abrasive—perfect for removing heavy material quickly, such as sanding old paint or smoothing out rough filler before moving to finer grits!
The 3M Hookit Blue Abrasive Sheet Roll 521U is expertly engineered for use in collision repair environments, making it an ideal choice for sanding a variety of substrates such as paint, primer, metal, and composite materials. This versatile abrasive solution is designed to deliver consistent, high-quality results across multiple surfaces, ensuring efficiency and reliability in every application.
Constructed with a robust E-weight paper backing, this abrasive sheet roll offers exceptional durability and a fast, aggressive cut. The sturdy backing not only enhances the longevity of the product but also maintains its performance throughout extended use, reducing the need for frequent replacements and contributing to overall cost-effectiveness.
Featuring the innovative 3M Hookit system, the Blue Abrasive Sheet Roll 521U utilizes a convenient hook-and-loop attachment method. This allows for quick and easy sheet changes, enabling users to reuse the abrasive material multiple times without sacrificing performance. The Hookit system streamlines workflow and minimizes downtime, making it a practical choice for busy automotive repair shops and professional sanding operations.
- Designed for sanding paint, primer, metal, and composite substrates in collision repair
- Fast-cutting abrasive with durable E-weight paper backing for extended product life
- Hookit hook-and-loop attachment system for easy, reusable application
- Consistent performance and reliable results across a range of surfaces

