The Mirka 23-332-040 Bulldog Gold-23 PSA Disc is a 5-inch heavy-duty sanding disc built for fast stock removal and surface prep. This is a PSA sanding disc designed for heavy sanding, stripping, and finishing prep. Model Number 23-332-040. With a coarse P40 grit, this disc is a good fit for users who need an aggressive cut before moving on to finer grits.

Mirka uses aluminum oxide abrasive on this disc, which matters because it gives you a durable cutting surface that holds up well in demanding sanding work. On rough wood, metal, or stone, that means the disc keeps cutting instead of dulling out right away. The coarse grit profile is geared toward heavy material removal, not final finish work, so it makes sense where speed matters more than a polished surface.

The pressure sensitive adhesive backing is the practical part of this design. PSA discs mount quickly to the correct backing pad and stay planted when you're pushing harder through stock removal work. If you prefer a simple peel-and-stick setup over hook-and-loop, this style is straightforward and secure, especially for shop sanding routines where you already run a PSA pad setup.

This disc uses a paper backing and a no-hole design. That makes it a better match for sanding setups that do not rely on through-pad dust extraction. Mirka's Bulldog Gold line is known for heavy-duty sanding applications, and the product description also notes an anti-load stearate coating and high-strength resin bonding to help resist clogging and support grain retention during use.

The 5-inch diameter is a common size for random orbit and other compatible sanding setups using PSA pads, which makes this a practical shop staple if you already run that format. The pack of 50 discs is also the right quantity for regular users who burn through coarse grits in prep work, filler leveling, or stripping jobs.

If you do bodywork prep, woodworking cleanup, metal surface prep, or general shop sanding where aggressive cut speed matters, this Mirka disc makes sense. If you need finish-ready scratch patterns, step up to a finer grit. But if your job starts with removing material fast, the Mirka 23-332-040 Bulldog Gold-23 PSA Disc is aimed at exactly that part of the process.

Mirka 23-332-040 Bulldog Gold-23 PSA Disc Gets Right to the Point

If you need a coarse 5-inch PSA sanding disc that cuts hard and keeps your workflow moving, this is the kind of shop consumable worth keeping on hand.

• Who it's for: Pros and serious DIY users doing surface prep, stock removal, filler leveling, or rough sanding on wood, metal, and similar materials.
• Why it stands out: You get Mirka's Bulldog Gold heavy-duty format, aluminum oxide abrasive, PSA backing, and a 50-pack that makes sense for regular use.
• Worth knowing: This is a no-hole PSA disc, so make sure your sanding setup is built for adhesive-backed discs and that you actually want a coarse P40 scratch pattern before you buy.

• What grit is this disc? This disc is P40, which is a coarse grit intended for aggressive material removal and rough prep work.
• What size is the disc? The disc diameter is 5 inches.
• Does this disc have vacuum holes? No. It uses a no-hole design.
• What type of backing does it use? It uses a pressure sensitive adhesive (PSA) backing with a paper backer.