Norton 180 Grit Perforated Foam Rolls are designed to deliver ease of use and superior finish. Conveniently perforated to fit a standard pole or hand sander, the foam rolls are durable and offer superior surface finish. 12 yards of 180 Grit Foam Backed Drywall Roll, for sanding paint and drywall. Perforated every 11-1/4" for easy separation and sander application. Foam-backed sanding rolls are ideal for fine sanding on corners, edges, contours and curves.