These excellent quality hook and loop 6″ random orbit sanding discs from Klingspor are available in 40 grit to 600 grit sizes and are sold 100 per box. The discs have the Festool 49 hole pattern to fit a number of their sander pad patterns and perform similar to the Festool “GRANAT” abrasives. They are long-lasting and a very high performing abrasive well suited for nearly all applications, including bare wood, paints, most modern paint systems, VOC clear coats, plastic materials, solid surface materials, acrylics, and composites. Hardened Aluminum Oxide, Synthetic Resin, Closed Coated.