Diablo 5-In. 320 Grit ROS Hook & Lock Universal Sanding Discs, 15-Pack are for final sanding and surface preparation before staining or varnishing. Crafted from a premium ceramic grain blend, these discs deliver fast material removal and a long sanding life. They feature a 12-hole universal pattern that fits all 5 and 8 hole sanders, making alignment quick and easy. The hook and lock backing ensures a secure and consistent connection, allowing for effortless attachment and removal. These sanding discs are enhanced with Clog-SHIELD technology to reduce pitch build-up and clogging, while the ENDURA-BOND grit-to-backing bond provides exceptional durability. Suitable for use with orbital and DA sanders on wood, metal, and plastics, these discs reliable performance for a variety of sanding tasks. Model Number: DCD050320H15G