The Mirka 40-341-120 PSA Disc is a coated abrasive sanding disc built for general surface sanding and prep work. This is a sanding disc designed for stock removal, smoothing, and prep on a compatible pressure sensitive adhesive backing pad. Model Number: 40-341-120. With Mirka's Coarse Cut-40 series, P120 grit, aluminum oxide abrasive, and paper backing, this disc is aimed at users who want a reliable everyday abrasive in shop quantities.

The P120 grit hits a useful middle ground for real work. It removes material faster than finer finishing grits, but it is still controlled enough for prep stages where you need to clean up a surface before moving on. If you are working through a sanding sequence, this is the kind of grit that helps bridge rough stock removal and finer finishing steps without wasting time.

Mirka builds this as a coated abrasive disc with aluminum oxide grain on a paper backing. That combination matters because it keeps the disc practical and cost-effective for broad sanding tasks where you need consistent cut and easy handling. The paper backing helps the disc stay flexible enough for common sanding setups, while the aluminum oxide abrasive is a proven choice for repeatable performance.

The pressure sensitive adhesive mounting style is a big part of the appeal here. PSA discs are straightforward to apply, stay put during use, and swap out fast when the abrasive is spent. On the job or in the shop, that means less messing around with attachment systems and more time actually sanding. For users who already run PSA pads, this is a simple, no-nonsense consumable.

This specific disc is a no-hole design, which is important to know before you buy. A no-hole disc is best suited to setups that do not rely on through-the-disc dust extraction. If your sander or backup pad is built around vacuum hole alignment, this is not the right match. If you are running a solid PSA pad, though, the no-hole format keeps setup simple.

The pack quantity of 100 also tells you who this product is really for. This is not a one-off disc for a drawer. It is a shop supply item for users who go through abrasives regularly and want to keep the right grit on hand. If you are stocking up for recurring sanding work, the 100-pack format makes more sense than piecing together small quantities.

Bottom line, the Mirka 40-341-120 PSA Disc makes the most sense for users who already know they want a 6 inch PSA sanding disc in P120 grit with no vacuum holes. It is a good fit for production sanding, prep work, and any workflow where quick disc changes, dependable cut, and bulk quantity matter more than fancy extras.

Mirka 40-341-120 PSA Disc keeps sanding simple

This is the kind of bulk abrasive buy that makes sense when you already know your setup and just need dependable discs that go on fast and get to work.

• Who it's for: Shops and serious users running 6 inch PSA sanding setups who want a steady supply of P120 discs.
• Why it stands out: Aluminum oxide abrasive, coated construction, and PSA backing give you a practical combination of cut, simplicity, and fast changeovers.
• Worth knowing: It is a no-hole disc, so check your pad and dust collection setup before you hit buy.

• What mounting system does this disc use? It uses pressure sensitive adhesive, also called PSA backing.
• Does this sanding disc have vacuum holes? No. This is a no-hole disc.
• What abrasive material is used? It uses aluminum oxide abrasive on a paper backing.
• How many discs come in the pack? Package quantity is 100 discs.