3M Hookit Microfinishing Film Disc 366L, 15 Mic 3MIL, Type D, 6 in x NH, Die 600Z, 50/Bag, 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 premium aluminum oxide abrasive. This fast-cutting mineral is bonded to a durable polyester film backing, ensuring long life and consistent results on many surfaces.

Designed for multi-step finishing, the 366L model features a hook and loop backing system for quick attachment and removal. This makes it ideal for use with orbital and random orbital sanders, enhancing workflow efficiency.

Precise 15 Micron Grade

This disc comes in a 15 Mic 3MIL grade, providing a fine finish suitable for detailed sanding and finishing tasks. The micron-graded aluminum oxide abrasive delivers a uniform finish while maintaining a fast cut rate.

Its precision grade supports applications on wood, composites, plastic, and metal, making it versatile for various industrial and woodworking projects. The 15 Mic specification ensures smooth results without sacrificing speed.

Durable 6 Inch Size

The disc measures 6 inches in diameter, fitting standard sanding tools and backup pads. This size is popular for both handheld and power tools, offering a balance between coverage and control during sanding.

Its polyester film backing adds tear resistance and flexibility, allowing the disc to conform to contours while maintaining durability. This makes the 6 in x NH format suitable for high-production environments.

Efficient Hookit Attachment System

The Hookit hook and loop backing system allows for fast, secure disc changes without adhesive residue. This feature supports multi-step finishing processes by enabling quick swaps between different grades or worn discs.

Compatible with various power tools, the system improves operator focus by simplifying tooling changes. The 3M Hookit design ensures the disc stays firmly attached during use, enhancing safety and performance.

Convenient 50 Pack Bag

Each bag contains 50 discs, providing ample supply for extended projects or multiple users. The pack size supports efficient inventory management and reduces downtime caused by frequent reordering.

With 500 discs per case, this packaging suits industrial or professional settings requiring bulk quantities. The 50/Bag, 500 ea/Case format ensures consistent availability for ongoing sanding and finishing needs.