A best-in-class abrasive for a variety of applications
Anti-loading coating prevents dust and debris from clogging the cutting surface
Discs available in mutli-hole pattern for excellent dust extraction or in no-hole format
Engineered ceramic mineral blend is balanced for maximum abrasive performance in its class
Upgraded resins improve durability and finish
The 3M Hookit Blue Abrasive Disc 321U delivers best-in-class performance at every stage of paint prep and coatings removal. Premium aluminum oxide mineral abrasive is blended with ceramic grain for a full range of sanding applications. The multi-hole discs feature a specially-designed pattern that reduces loading, extends disc life and aligns with most backup pads. Hookit attachment makes disc changes easy. Best-in-Class Performance in Every Grade
Part of our full line of 3M Blue Abrasives, the 3M Hookit Blue Abrasive Disc is engineered for best-in-class cut, life and efficiency across your entire shop. The disc features a tough ceramic blended with premium aluminum oxide mineral for just the right balance. 3M Blue Abrasives deliver consistently excellent results in a minimum amount of time, on jobs ranging from aggressive paint removal and fresh filler sanding to blend preparation and sanding primer. Discs are available in a wide range of sizes and grades.
Dust Extraction and Anti-Loading Features Enhance Performance and Life
The multi-hole pattern discs are specially designed to capture dust and keep it away from the abrasive surface. This specially-designed hole pattern reduces loading and extracts dust more efficiently compared to standard 6- or 7-hole disc configurations. It includes alignment guides across the disc, making it fast and easy to align with nearly any backup pad. The mineral blend on the 3M Hookit Blue Abrasive Disc is bonded using upgraded resins for enhanced durability. An anti-loading coating helps keep dust from gathering between the abrasive grains for a faster cut and for consistent performance throughout the life of the disc.
Our Hookit Attachment System
The Hookit attachment system has a hook-and-loop feature which makes disc attachment, removal, and re-attachment clean and easy. It also facilitates use and re-use of the disc for maximum product life. Hookit discs have a brushed nylon loop backing of the type most commonly used in everyday hook-and-loop applications. 3M Hookit disc pads (sold separately) feature hooks which grip the brushed nylon loop backing. It’s simple: just attach the disc and start sanding. The disc removes just as cleanly and easily. The Hookit system is designed for work spaces and applications where adhesive backed discs may become contaminated by dust, dirt, or debris.
Better Science for Better Sanding from 3M
Our 3M Blue Abrasives family is designed as a cost-effective, high-performance upgrade for any sanding application in coatings removal and paint preparation. From its balanced, engineered mineral blend to its multi-hole pattern option for dust extraction, our 3M Hookit Blue Abrasive Disc is another way that 3M applies science to deliver best-in-class performance for professionals.
Trusted 3M Hookit Quality
The 3M Hookit Blue Abrasive Disc 321U Multi-hole is a reliable choice for professionals. This 6 in disc features the trusted Hookit attachment system, making disc changes quick and clean without adhesive mess.
Designed by 3M, the 321U model offers consistent performance across sanding tasks. Its multi-hole format supports excellent dust extraction, improving efficiency during use.
Optimized Multi-hole Design
This abrasive disc includes a multi-hole pattern that enhances dust extraction and reduces loading. The holes align easily with most backup pads, speeding up setup and sanding.
Compared to standard 6- or 7-hole discs, this 321U disc’s hole pattern keeps the surface cleaner longer. It helps maintain cutting speed and extends disc life during paint prep or coatings removal.
Balanced Grade And Size
The 3M disc comes in a 150 grade, ideal for a range of sanding applications. Its 6 in diameter fits many common tools, providing versatility for different jobs.
With 50 discs per carton and 4 cartons per case, this pack size supports continuous work without frequent reordering. It suits busy shops needing reliable stock of abrasives.
Durable Ceramic Mineral Blend
The 321U disc uses an engineered ceramic mineral blend combined with premium aluminum oxide. This mix balances aggressive cutting with long-lasting durability for tough sanding tasks.
Upgraded resins hold the abrasive grains firmly, while an anti-loading coating prevents dust buildup. This keeps the disc cutting fast and consistent throughout its life.
Efficient Dust Extraction Features
Dust extraction is enhanced by the multi-hole pattern and anti-loading coating on the 3M Hookit Blue Abrasive Disc. These features reduce clogging and improve sanding speed.
The disc’s design supports cleaner workspaces and better visibility during sanding. It’s especially useful in paint prep and coatings removal where dust control matters.
