The Mirka 23-388-320 5 in P320 No-Hole PSA Sanding Discs are adhesive-backed sanding discs made for fine finishing and surface prep. This is a sanding disc designed for smoothing and refining surfaces before final finishing steps. Model Number: 23-388-320. If you need a consistent 5 inch abrasive disc for a pressure sensitive adhesive setup, this pack is built to keep work moving without stopping to reload after every few pieces.

What matters here is the balance of grit, backing, and disc style. The P320 abrasive grit puts this Mirka disc in the fine-sanding range, which makes it a good fit for dialing in a surface after heavier sanding has already been done. That is the point where a lot of jobs are either cleaned up properly or rushed. A P320 disc gives you a more controlled finish when you are trying to remove light marks, refine a previous scratch pattern, or prep a surface for the next coating or finishing stage.

The abrasive material is aluminum oxide, which is a proven choice for general sanding work. In plain terms, it is a practical abrasive for steady cutting and predictable results across repeated discs. Combined with the coated abrasive construction and paper backing, this Mirka sanding disc is built for users who want a familiar, straightforward consumable that does the job without overcomplicating the setup.

This version uses a pressure sensitive adhesive back instead of a hook and loop attachment. That matters if your sanding setup is built around PSA discs and you want a secure bond to the pad while you work. It is also a no-hole disc, so it is meant for applications and pad setups where vacuum hole patterns are not part of the system. If your machine or pad is already matched to no-hole PSA discs, this is the right style to look at.

The 5 inch diameter keeps it in a very common size range for sanding operations, which helps when you need manageable control on flat panels, smaller workpieces, or detail-oriented finishing steps. The Bulldog Gold-23 series name also tells you this is part of Mirka's abrasive lineup aimed at consistent shop use rather than one-off throwaway consumables.

This pack includes 100 discs, which is a real advantage for anyone doing repeat sanding work. Whether you are running through a production batch, doing finishing work in a body shop, or keeping the bench stocked for regular wood surface prep, buying in a 100-pack means fewer interruptions and better consistency from one disc to the next.

Who should buy this? Anyone already set up for 5 inch PSA sanding discs and looking for a fine grit abrasive for finishing stages. It makes the most sense for woodworkers, finishing shops, and users doing light surface refinement where a P320 sanding disc is the right next step. If you need a hook and loop disc or a vacuum-hole pattern, this is not that product. If you need a no-hole adhesive sanding disc in a fine grit and want quantity on hand, it is a clean fit.

Mirka 23-388-320 5 in P320 No-Hole PSA Sanding Discs Keep It Simple

If your setup takes 5 inch PSA discs and you need a fine grit for cleanup and finish prep, this is the kind of bulk abrasive pack that just makes sense.

• Who it's for: Shops and serious users running 5 inch PSA sanding setups for fine surface prep and finishing work.
• Why it stands out: You get a practical combination of P320 grit, aluminum oxide abrasive, no-hole construction, and a 100-pack count from a proven abrasives brand.
• Worth knowing: This is a pressure sensitive adhesive disc, not hook and loop, and it is a no-hole design, so make sure your pad matches before you load up the cart.

• What grit are these Mirka sanding discs? They are P320 grit discs intended for fine sanding and surface refinement.
• What size are the discs? Each disc has a 5 inch diameter.
• Do these discs have vacuum holes? No. This product uses a no-hole disc design.
• What type of backing do they use? They use a pressure sensitive adhesive backing, also called PSA.
• What abrasive material is used? These discs use aluminum oxide abrasive on a paper backing.