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SKU 7010326443
Legacy SKU 60440231086
UPC 00051141277615
Product Number 366L

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.

  • Aluminum oxide abrasive offers a fast cut, long life, and professional performance on many surfaces
  • 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
  • Available in both open coat and dust control
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On it's way to you June 25   


Minimum Order 500 Items
Order Increment 500 Items
  High-Quality Surface Finishes
  Reduces Abrasive Costs
  Long Lasting Performance
  Fantastic Price
Product Dimensions
Imperial Metric
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Width 0 null
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Diameter 6 in 152.4 mm
Center Hole Diameter 0 NP 0.0 NP
Shipping Dimensions
Weight 9.11832 lb
Length 14.01575 in
Width 14.01575 in
Height 7.00787 in
Color Red
Maximum Speed 12,000 rpm


  1. What is the 3M Hookit Microfinishing Film Disc 366L used for?

    The 3M Hookit Microfinishing Film Disc 366L is used for micro-precision finishing, polishing or contour sanding. It can be used on different surfaces including metal, composite and gelcoat.

  2. What are the dimensions of the disc?

    This hook-and-loop backed abrasive disc measures six inches in diameter with no hole pattern (NH).

  3. How fine is this disc’s abrasive grain size?

    The 100-micron grade provides a uniform finish during sanding while still preventing loading.

  4. How many discs come in a case and how are they packaged inside?

    One case contains up to five hundred discs plus fifty additional coatings all together sealed for protection as one piece comprising an order. Each individual pieces will then be supplied stacked together within separate plastic bags designed to prevent dust or debris contamination.

  5. : Can I use other types of backing pads with these disks?

    : Yes, but only when using specific Pad Holes Assignments that must align clearly the shapes between holes layout such like Item #09-0077 located at website under manufacturer catalog SKU#7000116486

For industrial/occupational use only. Not for consumer sale or use.
3M industrial and occupational products are intended, labeled, and packaged for sale to trained industrial and occupational customers for workplace use.  Unless specifically stated otherwise on the applicable product packaging or literature, these products are not intended, labeled, or packaged for sale to or use by consumers (e.g., for home, personal, primary or secondary school, recreational/sporting, or other uses not described in the applicable product packaging or literature), and must be selected and used in compliance with applicable health and safety regulations and standards (e.g., U.S. OSHA, ANSI), as well as all product literature, user instructions, warnings, and other limitations, and the user must take any action required under any recall, field action, or other product use notice.  Misuse of 3M industrial and occupational products may result in injury, sickness, death, or property damage.  For help with product selection and use, consult your on-site safety professional, industrial hygienist, or other subject matter expert.
The 3M™ Hookit™ Microfinishing Film Disc 366L

The 3M™ Hookit™ Microfinishing Film Disc 366L is a high-quality abrasive product designed for use with orbital and random orbital sanders. It 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.

These discs feature 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.

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.

3M Sanding Discs

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.

  • Load resistant coating to increase efficiency and product life
  • Resin-bonded abrasive supports disc flexibility without sacrificing durability
  • Polyester film backing flexes to help achieve a consistent finish over contours
  • Greater tear-resistance than comparable paper products
  • 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
  • Comes in a range of grades for complete multi-step sanding and finishing
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