The Fein 63717233020 zirconium sanding sheet set delivers high sanding performance on extremely hard surfaces, including varnish such as parquet lacquer and metal. The durable paper backing features tough synthetic resin bonding and a high-quality zirconium corundum abrasive coating for demanding floor covering and surface preparation work. The set contains 12 perforated sanding sheets with hook and loop fastening, suitable for use with or without dust extraction.