Mirka 2B-332-120 Q.Silver 5 in PSA Sanding Disc is a 5-inch pressure-sensitive adhesive abrasive disc built for fast sanding and surface preparation. This is a sanding disc designed for stock removal, prep sanding, and tough finishing work on wood, composites, and automotive surfaces. Model Number: 2B-332-120. If you need a disc that cuts consistently and holds together when the job gets hot, this one is built for exactly that kind of work.

The 120-grit abrasive hits a useful sweet spot for a lot of shop and jobsite sanding. It is aggressive enough for cleanup and leveling work, but still controlled enough for prep stages where scratch pattern matters. Mirka also calls out a tight grain distribution, which is important because a more even abrasive spread typically means a more consistent finish across the work surface instead of random deep scratches.

What separates this disc from bargain sandpaper is the backing and bond. Q.Silver uses a flexible, strong latex paper backing along with full resin bonding. In plain terms, that means the disc is built to flex, resist heat, and stay productive longer during harder sanding tasks. For anyone doing repeated passes on hardwood, body panels, or composite material, that matters more than flashy packaging. A disc that stays stable under pressure saves time and reduces disc changes.

Mirka positions this abrasive for demanding applications including automotive refinishing, woodworking, composites, and marine-related work. The stated heat resistance makes it a good fit for more aggressive sanding passes, including tougher down-to-metal style removal where cheaper discs can load up, wear out, or lose their cut too quickly. If your work shifts between surface prep and material removal, that broader usefulness is a real advantage.

This is a PSA sanding disc, so it is meant for sanders or backup pads that accept pressure-sensitive adhesive discs. That style is popular when you want a flat, secure attachment without hook-and-loop movement. The disc size is 5 inches, which fits a common sander format and makes replacement straightforward if you already run 5-inch PSA setups in the shop.

The pack size is another practical selling point. This listing is for 100 discs per pack, which makes more sense for production work, body shop use, cabinet work, and serious repeat sanding than buying small mixed packs every week. If you burn through abrasives regularly, buying in quantity keeps the same cut quality on hand and reduces downtime.

Who should buy it? This is a good fit for auto body techs, woodworkers, marine repair users, and anyone doing repeated sanding on wood or composite material with a 5-inch PSA sander. If you only sand occasionally, a small consumer pack may be enough. But if you want a workhorse abrasive with a known grit, heat resistance, and job-friendly pack count, this Mirka disc makes a lot more sense.

Mirka 2B-332-120 Q.Silver 5 in PSA Sanding Disc Gets the Basics Right

This is the kind of abrasive that makes sense for people who actually sand a lot and need steady performance, not a bargain-bin disc that quits when the work gets serious.

• Who it's for: Auto body users, woodworkers, marine repair shops, and anyone running a 5-inch PSA sander for regular prep and removal work.
• Why it stands out: The latex paper backing, resin bond, heat resistance, and 100-pack count make it a better fit for repeat work than cheap consumer-grade discs.
• Worth knowing: This is a PSA disc, so make sure your sander or backup pad is set up for pressure-sensitive adhesive discs rather than hook-and-loop.

• What grit is this sanding disc? It is a 120-grit disc.
• What size is the disc? The disc diameter is 5 inches.
• What attachment style does it use? It uses PSA, which stands for pressure-sensitive adhesive.
• What materials is it suited for? Source data lists automotive applications, hardwood, composites, and wood.