The Mirka 40-332-060 Coarse Cut PSA Disc, 5 Inch is a coarse sanding disc built for heavy material removal on demanding prep work. This is a 5-inch PSA sanding disc designed for coarse sanding, stripping, and surface leveling. Model Number 40-332-060. If you are sanding lacquer, body filler, fiberglass-reinforced polyester, or weld seams, this is the kind of disc you reach for when the job starts rough and speed matters.

The big story here is cut speed without giving up durability. Mirka positions the Coarse Cut line as an aggressive abrasive for heavy-duty sanding, and the P60 grit backs that up. On the job, that means faster knockdown on hard coatings and filler, less time trying to force a worn disc to keep working, and a cleaner path to your next grit.

Mirka also calls out the specially reinforced backing and its Progressive Bond technology. In plain terms, that is about keeping the abrasive working longer under pressure. Cheaper coarse discs often start breaking down at the edges, especially when you hit metal edges, contours, or uneven repairs. Edge wear matters because once the edge starts failing, the scratch pattern gets inconsistent and the disc stops cutting the way it should.

The semi-open coat design is there for a reason too. Coarse sanding creates a lot of debris fast, and loading is what kills productivity. A disc that resists clogging keeps cutting more consistently and saves you from peeling it off early just because it packed up. That is especially useful when you are working on fillers, coatings, and other materials that can gum up a lesser abrasive.

Because this is a PSA disc, it is meant for sanders and backup pads that use pressure-sensitive adhesive mounting rather than hook and loop. That style gives you a firm, direct connection to the pad, which is a good match for more aggressive sanding where you want the disc to stay put. The 5-inch size keeps it in a common format for finish and prep work, especially in automotive, metalworking, and surface repair settings.

This Mirka sanding disc makes the most sense for users doing real prep work, not light touch-up sanding. Body shops, metal fabricators, refinishers, and serious DIY users working on filler, coatings, or weld cleanup will get the most out of it. If your goal is fine finish sanding, this is not the disc for that. If your goal is to remove material quickly, keep the disc stable, and move the job forward, it is exactly the right kind of abrasive.

Mirka 40-332-060 Coarse Cut PSA Disc, 5 Inch Gets Right to Work

This is the kind of sanding disc you buy when the surface is rough, the material is stubborn, and you do not want to waste time babying a weak abrasive.

• Who it's for: Body shop techs, metal fabricators, refinishers, and serious DIY users doing aggressive prep work.
• Why it stands out: Fast P60 cutting action, reinforced backing, and a design aimed at reducing edge wear and loading during heavy sanding.
• Worth knowing: This is a PSA disc, so make sure your sander or backup pad is set up for pressure-sensitive adhesive discs, and remember it is meant for coarse removal, not finish sanding.

• What grit is this disc? It is P60 grit, which is a coarse grade for aggressive material removal.
• What size is the disc? The disc diameter is 5 inches.
• What attachment style does it use? It uses PSA backing, which means pressure-sensitive adhesive mounting.
• What materials is it suited for? Source data says it is suitable for sanding lacquer, putty, fiberglass-reinforced polyester, and weld seams.
• Where is it made? The product marking shown in the image states Made in Finland.