3M Hookit Microfinishing Film Disc 366L, 100 Mic 3MIL, Type D, 5 in x NH, Die 500X, 50/Pac, Case of 500

• Aluminum oxide abrasive offers a fast cut, long life, and professional performance on many surfaces
• Available in both open coat and dust control
• Durable polyester film backing enables close-tolerances and consistent finish
• Hookit hook and loop backing allows quick attachment and removal for multi-step finishing processes
• Load-resistant coating prevents dust and debris from clogging the disc

3M Hookit Microfinishing Film Disc 366L is rated Best in the 3M Microfinishing line of film backed discs. It features premium, micron-graded aluminum oxide abrasive bonded to a durable polyester film backing to produce a fast cut-rate and uniform finish on wood, solid surface composites, plastic, fiberglass, paint prep, coating and corrosion removal, primer, e-coat, or metal.

We gave these discs a load resistant coating to increase efficiency and product life by minimizing loading. The abrasive is resin-bonded and supports disc flexibility without sacrificing durability and reliable performance under high heat and pressure. To complement the effective abrasive action, the polyester film backing flexes to help achieve a consistent finish over contours and offers greater tear-resistance than comparable paper products, making it ideal for high-production environments. And the 3M Hookit attachment and removal system holds the disc securely during use and provides easy disc change out. Designed for use with orbital and random orbital sanders, this disc comes in a range of grades for complete multi-step sanding and finishing.

Our 3M Hookit Microfinishing Film Disc 366L features precision, micron-graded aluminum oxide, which is a popular choice among industrial professionals because of its fast cut-rate and long life. This mineral makes a tough, durable abrasive that self-fractures to expose fresh cutting edges, whereas traditional natural abrasives dull more quickly. Due to its fast cut-rate, hardness, and strength, it is widely used in grinding applications in addition to sanding and finishing applications. Aluminum oxide is suitable for a wide variety of materials in both woodworking and metalworking, including ferrous alloys.

Whether the job requires a random orbital or rotary sander, buffer, grinder, drill, finishing sander or other power tool, hook-and-loop products allow the operator to focus more on the task and less on tooling. Abrasive products with hook-and-loop backing, including 3M Hookit products, are manufactured with loop material that attaches to a backup pad, sold separately, where tiny hooks firmly engage the loops. Attachment is quick, easy, and secure during use. Sanding, finishing, and surface conditioning products with the hook-and-loop attachment and removal system provide an efficient way to work through multi-step finishing processes and can be used again and again for the life of the abrasive.

Our 3M sanding discs come in a variety of forms to fit various power tools and disc pads. Hook and Loop sanding discs are designed to be used with a random orbital sander, a handheld sanding machine that rotates the disc in a random pattern to prevent swirl marks from forming on the surface of the workpiece. The sander is fitted with a backup pad (sold separately) to which the sanding disc is attached. Hook-and-loop discs are quick and easy to change when switching from one grade to another, and can be reused again and again until worn out; whereas adhesive-backed discs are typically discarded after one use because the adhesive backing will not re-adhere a second time.

Trusted 3M Hookit Quality

The 3M Hookit Microfinishing Film Disc 366L offers professional-grade performance with its aluminum oxide abrasive. This fast-cutting, long-lasting abrasive is bonded to a durable polyester film backing for consistent results. The exact model, 366L, ensures you get the trusted 3M quality you expect.

Designed for various surfaces, this disc is ideal for wood, composites, plastics, and metals. Its 3MIL thickness and Type D backing provide reliable durability during sanding and finishing tasks, making it a solid choice for industrial and professional use.

Precise Size And Format

Measuring 5 inches in diameter with an NH die 500X, this microfinishing film disc fits many standard orbital and random orbital sanders. The specific size ensures compatibility with common power tools, allowing for efficient sanding and finishing.

The film disc format includes a Hookit hook and loop backing system, which enables quick attachment and removal. This makes switching between sanding steps easier and reduces downtime during projects.

Efficient Multi-Step Finishing

The Hookit hook and loop backing system supports multi-step finishing processes by allowing fast disc changes. This feature helps maintain workflow efficiency, especially when using the 50 discs per pack included in this product.

Because the discs can be reused multiple times until worn out, they offer cost savings over adhesive-backed alternatives. The 3MIL polyester film backing also provides tear resistance, ideal for high-production environments.

Durable Load-Resistant Coating

This 3M disc features a load-resistant coating that prevents dust and debris from clogging the abrasive surface. This coating extends the disc’s life and maintains cutting efficiency during use.

The durable polyester film backing flexes to conform to contours, ensuring a consistent finish. This makes the disc suitable for a variety of materials, including paint prep, corrosion removal, and primer sanding.

Bulk Pack Convenience

Each case contains 500 individual discs, packaged in 50 packs of 10. This bulk packaging supports large-scale projects and industrial use, reducing the need for frequent reordering.

The large quantity combined with the 5-inch size and Hookit system makes this product a practical choice for professionals who require reliable sanding discs in high volumes.