The Mirka 23-314-320 PSA Disc Roll is a 5-inch abrasive disc pack built for fine sanding and surface finishing. This is a PSA sanding disc designed for finish sanding, surface prep, and polishing work where a clean, controlled cut matters more than aggressive stock removal. Model Number: 23-314-320.

This Mirka sanding disc uses P320 grit, which puts it in the fine-finish range for smoothing surfaces before paint, sealer, or other final steps. If you are stepping through grits and need a disc that helps refine the scratch pattern without jumping straight to ultra-fine paper, this is the kind of abrasive that earns its spot in the shop.

The abrasive material is aluminum oxide on a paper backing. That matters because aluminum oxide is a proven general-purpose grain for everyday sanding work, and the paper backing keeps the disc flexible enough for finish work while staying practical for high-volume use. Supplementary source data also identifies this as a coated abrasive in Mirka's Bulldog Gold-23 series, a line known for general sanding duty.

The pressure sensitive adhesive backing is the big setup detail here. PSA discs are made for users who want a firm, direct attachment to the sanding pad rather than a hook-and-loop interface. That can be a good fit when you want the disc to stay planted during consistent finish sanding passes. Just know what you are buying: this is a PSA-mounted disc, not a hook-and-loop disc.

This version uses a no-hole pattern. That means it is intended for setups that do not require vacuum extraction through the disc itself. For the right sander and pad, that keeps the setup simple. For the wrong pad, it is the wrong disc. Match the disc to your backing pad before you order.

Package quantity is 100 discs, so this is aimed at users who go through abrasives regularly rather than someone looking for a small starter pack. If you are sanding in batches, stocking a finishing bench, or keeping consumables ready for repeatable production work, the larger pack size makes more sense than chasing small quantities every few jobs.

Who should buy it? Anyone who already runs a 5-inch PSA sanding setup and needs fine-grit discs for final prep. That includes woodworkers, finish carpenters, paint and body users, cabinet shops, and serious DIY users who understand their sanding system. If your machine takes 5-inch PSA discs and you want a P320 finish disc in shop quantity, this Mirka option is straightforward and job-ready.

Buy It If Your Sander Runs PSA and You Need a True Finish Grit

The Mirka 23-314-320 PSA Disc Roll is a no-nonsense finishing abrasive for users who already know their setup and need reliable 5-inch P320 discs in real shop quantity.

• Who it's for: Woodworkers, finish shops, paint prep users, and serious DIYers running 5-inch PSA sanding pads.
• Why it stands out: Fine P320 grit, aluminum oxide abrasive, and a 100-count pack make it practical for repeat finishing work instead of one-off touchups.
• Worth knowing: This is a no-hole PSA disc, so make sure your pad is set up for pressure sensitive adhesive discs and does not require a vacuum-hole pattern.

• What grit is this Mirka sanding disc? It is P320 grit, which is suited to fine sanding and finish surface prep.
• Is this a hook-and-loop sanding disc? No. It uses a Pressure Sensitive Adhesive (PSA) backing.
• Does this disc have vacuum holes? No. The hole design is listed as no hole.
• How many discs come in the pack? The package quantity is 100 discs.