3M Hookit Blue Abrasive Disc 321U Multi-hole, 36151, 3 in, 400, 50 discs per carton, 4 cartons per case

• 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 trusted choice for professionals who need reliable sanding performance. This model combines 3M’s expertise with a Hookit attachment system, making disc changes quick and clean.

Designed for ease of use, the Hookit system attaches securely with a hook-and-loop backing. This feature supports efficient sanding and re-use, ideal for busy shops using the 3 in discs in various applications.

Multi-Hole Dust Extraction

This 3 in, 400 grade disc features a multi-hole pattern that enhances dust extraction. The holes are specially arranged to reduce loading and keep the abrasive surface clear, improving cut speed and disc life.

Compared to standard 6- or 7-hole discs, this multi-hole design aligns easily with most backup pads. It’s perfect for maintaining a clean work environment and consistent sanding results.

Durable Ceramic Mineral Blend

The 3M Hookit Blue Abrasive Disc 321U uses an engineered ceramic mineral blend balanced for top abrasive performance. This blend combines ceramic grain with premium aluminum oxide for effective sanding across many tasks.

Upgraded resins in the disc improve durability and finish quality. This makes the 400 grade discs suitable for aggressive paint removal, filler sanding, and blend preparation, ensuring long-lasting use.

Convenient Pack Size Options

Each carton contains 50 discs, and the product is sold in cases of 4 cartons. This pack size supports efficient inventory management and ensures you have enough 3 in discs for ongoing projects.

Having 200 discs per case means you can stock up for extended use without frequent reordering. This is especially useful in busy workshops where sanding is a daily task.

Anti-Loading Coating Benefits

The anti-loading coating on the 3M Hookit Blue Abrasive Disc 321U helps prevent dust and debris from clogging the cutting surface. This keeps the disc cutting fast and consistent throughout its life.

By reducing dust buildup, the coating extends the disc’s effective sanding time. This feature works well with the multi-hole design to maintain performance and reduce downtime for cleaning or disc changes.