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  • 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

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.

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3M™ Hookit™ Microfinishing Film Disc 366L, 40 Mic 3MIL, Type D, Config 3M™ Hookit™ Microfinishing Film Disc 366L, 20 Mic 3MIL, Type D, Config 3M™ Hookit™ Microfinishing Film Disc 366L, 15 Mic 3MIL, Type D, Config
3M™ Hookit™ Microfinishing Film Disc 366L, 30 Mic 3MIL, Type D, Config 3M™ Hookit™ Microfinishing Film Disc 366L, 100 Mic 3MIL, Type D, Config 3M™ Hookit™ Microfinishing Film Disc 366L, 60 Mic 3MIL, Type D, Config
3M™ Hookit™ Microfinishing Film Disc 366L, 180 Mic 3MIL, Type D, Config 3M™ Hookit™ Microfinishing Film Disc 366L, 120 Mic 3MIL, Type D, Config 3M™ Hookit™ Microfinishing Film Disc 366L, 150 Mic 3MIL, Type D, Config
3M™ Hookit™ Microfinishing Film Disc 366L, 220 Mic 3MIL, Type D, Config 3M™ Hookit™ Microfinishing Film Disc 366L, 50 Mic 3MIL, Type D, Config 3M™ Hookit™ Microfinishing Film Disc 366L, 80 Mic 3MIL, Type D, Config
3M™ Hookit™ Microfinishing Film Disc 366L, 180 Mic 3MIL, Type D, 5 in x
NH, Die 500X, 50 per inner, 500 per case 3M™ Hookit™ Microfinishing Film Disc 366L, 20 Mic 3MIL, Type D, 5 in x
NH, Die 500X, 50 per inner, 500 per case 3M™ Hookit™ Microfinishing Film Disc 366L, 30 Mic, Type D, 2 in x NH,
Die 200P
3M™ Hookit™ Microfinishing Film Disc 366L, 30 Mic, Type D, 2 in x NH, Die 200P
Full Retail Price $84.00
Online Only Price $53.34
You save $30.66!
3M™ Hookit™ Microfinishing Film Disc 366L, 30 Mic, Type D, 1 in x NH,
Die 100N 3M™ Hookit™ Microfinishing Film Disc 366L, 80 Mic, Type D, 1 in x NH,
Die 100N 3M™ Hookit™ Microfinishing Film Disc 366L, 100 Mic, Type D, 1 in x NH,
Die 100N
3M™ Hookit™ Microfinishing Film Disc 366L, 30 Mic, Type D, 1 in x NH, Die 100N
Full Retail Price $288.00
Online Only Price $182.88
You save $105.12!
3M™ Hookit™ Microfinishing Film Disc 366L, 80 Mic, Type D, 1 in x NH, Die 100N
Full Retail Price $288.00
Online Only Price $182.88
You save $105.12!
3M™ Hookit™ Microfinishing Film Disc 366L, 100 Mic, Type D, 1 in x NH, Die 100N
Full Retail Price $288.00
Online Only Price $182.88
You save $105.12!
3M™ Hookit™ Microfinishing Film Disc 366L, 15 Mic, Type D, 1 in x NH,
Die 100N 3M™ Hookit™ Microfinishing Film Disc 366L, 15 Mic, Type D, 5 in, Die
500LG, Clean Sanding 3M™ Hookit™ Microfinishing Film Disc 366L, 100 Mic, Type D, 5 in, Die
500LG, Clean Sanding
3M™ Hookit™ Microfinishing Film Disc 366L, 15 Mic, Type D, 1 in x NH, Die 100N
Full Retail Price $288.00
Online Only Price $182.88
You save $105.12!
3M™ Hookit™ Microfinishing Film Disc 366L, 15 Mic, Type D, 5 in, Die 500LG, Clean Sanding
Full Retail Price $486.00
Online Only Price $308.61
You save $177.39!
3M™ Hookit™ Microfinishing Film Disc 366L, 100 Mic, Type D, 5 in, Die 500LG, Clean Sanding
Full Retail Price $510.00
Online Only Price $323.85
You save $186.15!
3M™ Hookit™ Microfinishing Film Disc 366L, 30 Mic, Type D, 5 in, Die
500LG, Clean Sanding 3M™ Hookit™ Microfinishing Film Disc 366L, 60 Mic, Type D, 5 in, Die
500LG, Clean Sanding 3M™ Hookit™ Microfinishing Film Disc 366L, 20 Mic, Type D, 5 in, Die
500LG, Clean Sanding
3M™ Hookit™ Microfinishing Film Disc 366L, 30 Mic, Type D, 5 in, Die 500LG, Clean Sanding
Full Retail Price $510.00
Online Only Price $323.85
You save $186.15!
3M™ Hookit™ Microfinishing Film Disc 366L, 60 Mic, Type D, 5 in, Die 500LG, Clean Sanding
Full Retail Price $510.00
Online Only Price $323.85
You save $186.15!
3M™ Hookit™ Microfinishing Film Disc 366L, 20 Mic, Type D, 5 in, Die 500LG, Clean Sanding
Full Retail Price $510.00
Online Only Price $323.85
You save $186.15!
3M™ Hookit™ Microfinishing Film Disc 366L, 80 Mic, Type D, 3-1/2 in x
NH, Die 350HH 3M™ Hookit™ Microfinishing Film Disc 366L, 15 Mic, Type D, 3-1/2 in x
NH, Die 350HH 3M™ Hookit™ Microfinishing Film Disc 366L, 15 Mic, Type D, 3 in x NH,
Die 300V
3M™ Hookit™ Microfinishing Film Disc 366L, 80 Mic, Type D, 3-1/2 in x NH, Die 350HH
Full Retail Price $534.00
Online Only Price $339.09
You save $194.91!
3M™ Hookit™ Microfinishing Film Disc 366L, 15 Mic, Type D, 3-1/2 in x NH, Die 350HH
Full Retail Price $534.00
Online Only Price $339.09
You save $194.91!
3M™ Hookit™ Microfinishing Film Disc 366L, 15 Mic, Type D, 3 in x NH, Die 300V
Full Retail Price $684.00
Online Only Price $434.34
You save $249.66!
3M™ Hookit™ Microfinishing Film Disc 366L, 100 Mic, Type D, 3 in x NH,
Die 300V 3M™ Hookit™ Microfinishing Film Disc 366L, 30 Mic, Type D, 3 in x NH,
Die 300V 3M™ Hookit™ Microfinishing Film Disc 366L, 30 Mic 3MIL, Type D, 3 in x
NH, Die 300V, 100 per inner, 1000 per case
3M™ Hookit™ Microfinishing Film Disc 366L, 100 Mic, Type D, 3 in x NH, Die 300V
Full Retail Price $684.00
Online Only Price $434.34
You save $249.66!
3M™ Hookit™ Microfinishing Film Disc 366L, 30 Mic, Type D, 3 in x NH, Die 300V
Full Retail Price $684.00
Online Only Price $434.34
You save $249.66!
   
 
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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.