The Mirka Iridium 6 in. PSA Sanding Disc 320 Grit, model 24-342-320, is a fine-grit abrasive disc sold in a 100-pack for sanding and surface prep work. This is a 6-inch PSA sanding disc designed for surface sanding and finish prep. If you need a disc for refining a surface before the next step, this grit range is the part of the process where scratch pattern matters and consistency matters even more.

What stands out here is the straightforward setup: 6 inch diameter, PSA backing, and 320 grit. That combination tells you exactly where this product lives in the workflow. The 6 inch format suits common disc sanding applications, while the pressure-sensitive adhesive style backing is meant for users who want a firm attachment to the pad without fussing with loose fitment. The 320 grit rating is a finer option, which makes it a practical choice when you are cleaning up previous sanding marks, refining a surface, or getting material ready for coating, paint, or final finishing steps.

Being part of the Mirka Iridium line also matters for buyers who already know the brand and want to stay with a proven abrasive platform. On sanding products, consistency from disc to disc is a big deal. A box of 100 is not just a quantity spec, it is a workflow spec. It means this product is aimed at people who sand regularly enough to care about keeping the same grit and disc type on hand for repeatable results.

The PSA format makes this Mirka sanding disc a fit for users who prefer adhesive-backed discs rather than a hook-and-loop style interface. That is worth paying attention to before you buy. If your setup is built around PSA pads, this is the right style. If your sander is set up for another attachment method, you will want to confirm pad compatibility first. That is the kind of small detail that saves time and frustration once the box lands on the bench.

For shop use, the 100-pack count is the practical play. It works for anyone doing repeated prep on wood, primer, filler, paint, or other finish-sensitive surfaces where stepping up to a fine grit is part of the normal sequence. Instead of buying a few discs at a time and mixing brands or backing types, you get one consistent pack sized for real use.

Who should buy this? Painters, body and finish prep users, woodworkers, cabinet shops, and serious DIYers who already know they need a 320 grit 6 inch PSA sanding disc, not a coarse stripping disc and not a hook-and-loop disc. If your work depends on a finer finish stage and you want a box quantity that supports regular production, this Mirka abrasive is aimed right at that job.

Mirka Iridium 6 in. PSA Sanding Disc 320 Grit Is the Right Buy for the Finish Stage

This is the kind of abrasive you buy when you already know the job is not heavy removal, it is clean, controlled finish prep.

• Who it's for: Woodworkers, finish guys, paint prep users, and anyone running a PSA-backed 6 inch sander who needs fine-grit discs in real quantity.
• Why it stands out: The useful combination is simple: 6 inch size, PSA backing, 320 grit, and a 100-pack from Mirka's Iridium line.
• Worth knowing: Make sure your setup takes PSA discs. That is the only detail that matters before checkout, because backing style is not something you want to discover after the box is open.

• What type of abrasive is this? This is a 6 inch PSA sanding disc from the Mirka Iridium line.
• What grit is it? This disc is rated at 320 grit, which is suited to finer sanding and surface prep work.
• How many discs are included? The package quantity is 100 discs.
• Where is it made? Source data lists Finland as the country of origin.