Self Adhesive 6 inch PSA
PSA sanding discs are generally cheaper (all else being the same) and can be set up on a hard pad on the sander to be very flat. 6 inch PSA sanding discs are used for specific projects with their size. Larger production shops often have a sander for each grit need and will use the disks until they are quite worn out, maximizing their expense. Check out our blog if you're not sure if you should use self adhesive discs or hook and loop discs.