Mirka Gold 5-in. 8-Hole 80 Grit PSA Sanding Discs, 100-Pack (23-320-080)

The Mirka Gold 5 Inch 8 Hole PSA Vacuum Disc P80 100 Pieces is a 5-inch PSA sanding disc pack built for fast material removal and controlled surface prep on wood, metal, and plastic. This is a sanding disc designed for finishing and heavy stock removal. Model Number: 23-320-080. If you need a reliable abrasive for flattening, stripping, or getting a surface ready for the next grit, this is the kind of consumable that earns its keep.

What matters here is how the abrasive performs under real use. The P80 grit is coarse enough to move material at a useful pace without jumping straight into overly aggressive grinding. Mirka calls out this disc for finishing and heavy stock removal, which makes it a solid choice for early sanding stages, surface correction, and prep work where speed matters but you still want a consistent scratch pattern you can refine later.

The disc uses durable aluminum oxide grain, and that matters because sharp grain cuts faster and stays productive longer. Mirka also specifies high-strength resin bonding for better grain support, plus a proprietary backing that is stronger than traditional backing used by competing brands. In plain terms, that means the disc is built to hold together under pressure instead of giving up when the work gets hot or dusty.

For cleaner sanding, this disc uses an 8-hole vacuum pattern. Combined with the special stearate coating and semi-open coat design, the setup is aimed at resisting clogging and loading while helping dust move away from the work surface. That is a big deal on paint prep, filler work, and sanding tasks that normally pack abrasive discs full before the job is done.

The pressure-sensitive adhesive backing keeps attachment simple for PSA-compatible sanding pads. Once installed, you get a firm hold that helps the disc stay flat and cut evenly. The 5-inch diameter is a common size for sanding applications, and Mirka also lists fitment with DeWalt DC421 and DC423, plus 5-inch Ryobi and Bosch 3107 and 3725 tools.

This pack is best suited for body shop work, woodworking, metal prep, plastic surface prep, and general shop sanding where you go through discs regularly and need box quantity on hand. If you are a pro who wants a known abrasive that cuts cleanly and resists loading, or a serious DIY user doing refinish or prep work, this Mirka sanding disc pack makes sense.

Mirka Gold 5 Inch 8 Hole PSA Vacuum Disc P80 100 Pieces is a shop box, not a throwaway add-on

If you burn through sanding discs doing prep work, this is the kind of bulk abrasive that makes sense because it is built to cut fast, resist loading, and stay consistent.

• Who it’s for: Woodworkers, body shop techs, metal fabricators, and serious DIY users doing regular surface prep.
• Why it stands out: You get Mirka’s aluminum oxide grain, stronger backing, resin bond, stearate coating, and an 8-hole vacuum pattern in a 100-piece box.
• Worth knowing: This is a PSA disc, so make sure your sanding pad uses pressure-sensitive adhesive rather than hook and loop.

• What grit is this disc? This is a P80 sanding disc.
• What materials can it be used on? Mirka lists wood, metal, and plastic as compatible materials.
• What size is the disc? The disc is 5 inches in diameter, also listed as 125 mm.
• Does it support dust extraction? Yes. It uses an 8-hole vacuum disc pattern intended for vacuum-assisted sanding setups.