Self Adhesive Discs: For sanding Wood,Paint, Primer and Lacquer. Product Description:Self Adhesive Discs For wood, paint, primer and lacquer. Abrasive Grain: A/O, SIC, Backing: Paper, Cloth Bond: R/R Coated: Closed/opened Grit: P40-2000 Anti-clog coating, Maximum resistance to clogging and loading, Perfect grain boned and good performance.