Mirka Gold Multifit 6-in. P40 Hook and Loop Sanding Discs for Orbital Sanders, 50-Pack (23-6MF-040)

The Mirka GOLD Multifit 6″ Grip P40 sanding discs are 150 mm hook and loop abrasive discs built for aggressive sanding and material removal across wood, metal, fillers, primers, plastics, and painted surfaces. This is a hook and loop sanding disc designed for dust-managed orbital sanding and heavy stock removal. Model Number: 23-6MF-040. If you need a coarse 6 inch abrasive that cuts quickly and fits a broad range of random orbital sanding setups, this is the kind of disc that earns its keep fast.

P40 is an extra coarse grit, so this version is aimed at the front end of surface prep, not final finish work. It is the right call when you need to strip paint, knock down body filler, level plaster or filler, or break down rough stock before stepping through finer grits. The aluminum oxide grain is there for one reason: consistent cutting speed with good life. That matters when you’re trying to move material, not just polish it.

Mirka’s GOLD line is known for being a durable general-purpose abrasive, and the key detail here is the Multifit universal hole configuration. Instead of being locked into one exact pad pattern, the disc is designed to work with many 6 inch dust-free orbital sander setups and backing pads. In real use, that means better odds of lining up with your tool’s extraction holes and less time hunting for a perfectly matched disc pattern every time you reorder abrasives.

The grip backing gives you quick disc changes and a secure hold on the pad. On the job, that saves time when you’re burning through coarse grit during paint removal or surface leveling. Supplementary product data also lists a resin-over-resin bond and semi-open coating, which supports what you want from a workhorse abrasive: grain support, steady cutting action, and better resistance to loading when you’re sanding coatings, fillers, and wood products.

This disc is also built around dust extraction performance. Cleaner sanding is not just about the shop staying cleaner. It helps the abrasive keep cutting, reduces surface contamination, and makes it easier to see what the material is actually doing underneath old paint, primer, or filler. If you use a vacuum-assisted orbital sander, the hole pattern is one of the biggest reasons to choose a disc like this over a cheaper basic paper disc.

Material coverage is broad. Mirka lists this abrasive for copper alloys, brass, bronze, non-ferrous metal, paint stripping and removal, plaster, filler, fiberglass, synthetic materials, chipboard, veneer, plastics, primer, paint sanding, body filler, hardwood, softwood, resinous wood, and lacquers. That range makes it a practical box to keep around for body shops, cabinet and millwork prep, remodel work, and general finishing departments that move between substrates.

The 6 inch diameter fits common orbital sander platforms that use 150 mm discs, and the 50-piece pack size makes sense for regular shop use. This is not a specialty one-off abrasive. It is a shop staple for users who need an extra coarse sanding disc that fits standard 6 inch dust-extraction sanding workflows and can handle both heavy removal and early-stage surface prep before moving to finer grits.

Who should buy it? Pros and serious DIY users who already know when coarse grit is the right tool for the job. If you’re stripping finishes, shaping filler, flattening rough surfaces, or doing prep work before finer sanding steps, this Mirka disc makes sense. If you are chasing final finish quality, skip P40 and move up the grit ladder. But when the job is fast removal and solid dust management, this one is right in its lane.

Start Aggressive, Then Work Your Grits

The Mirka GOLD Multifit 6″ Grip P40 sanding discs are a smart pick when the job starts with heavy removal and you want a disc that plays well with dust extraction.

• Who it’s for: Body shop techs, finish prep crews, woodworkers, remodelers, and serious DIY users who need a coarse 6 inch sanding disc for stripping, leveling, and early-stage prep.
• Why it stands out: The universal Multifit hole pattern is the real value here. It makes these discs easier to use across different 150 mm orbital sanding setups, and the aluminum oxide grain gives you the cut you expect from a true work disc.
• Worth knowing: This is P40, so it is supposed to be aggressive. Great for removal, not for finish-ready surfaces. Plan on following it with finer grits.

• What type of sander is this disc made for? It is designed for 6 inch orbital sanders and backing pads that use hook and loop abrasive discs.
• What does P40 grit mean? P40 is an extra coarse grit intended for aggressive stock removal, paint stripping, filler shaping, and rough surface prep.
• Can this disc be used with dust extraction? Yes. The Multifit universal hole configuration is designed for dust-free sanding setups and broad backing pad compatibility.
• What materials can it sand? Mirka lists it for wood, non-ferrous metal, plastics, fiberglass, plaster, filler, primer, paint, lacquer, veneer, chipboard, and similar prep materials.