5" Sanding Discs for Non-Shopsmith Random Orbit Sanders. Shopsmith 5” Hook & Loop 8-Hole Sanding Discs Feature High Performance Grain on a Durable Plastic Film Backing. Shopsmith's premium abrasive products feature advanced technology with a combination of the highest quality abrasive grains, mated with the most durable backings to give you the fastest-cutting, longest-lasting abrasives available. Enjoy superior finishing results with these revolutionary film-backed sanding discs that resist tearing and edge wear to give you four times the life and a super-smooth sanding surface. Includes: (15) 320 Grit, 5 Inch Hook & Loop-Backed 8-Hole Sanding Discs