Sanding Discs for Wood - Perfect for multi-purpose sanding projects and hard woods such as oak and maple or building boards like plywood. Industrial strength, this paper provides users with the highest quality aluminum oxide grit and resin bonding agent. Superior performance and long life. Bosch sanding discs are cleanly pre-punched with 8 holes for uniform dust extraction through the pad without creating unwanted swirl marks or scratches on the work surface.