5" ProFoam Abrasive Discs, Very Fine, 9 hole. 5mm Flat: Excellent for flat scuff sanding. Although the ProFoam abrasive discs may feel aggressive on the surface of the pad, the foam allows for gentle sanding without leaving deep scratches on the surface. Great for sanding raw wood surfaces as well as finished surfaces. This is not for contoured surfaces that you don’t wish to flatten or break edges.