Diablo 5-In. 320 Grit ROS Hook & Lock Universal Sanding Discs, 50-Pack are for final sanding and surface preparation before applying stain or varnish. Crafted from a premium ceramic grain blend, these discs provide fast material removal and a long sanding life. They feature a 12-hole universal hole pattern for quick and easy alignment, fitting all 5 and 8 hole sanders. The hook and lock backing ensures a secure and consistent connection, making attachment and removal effortless. With Clog-SHIELD technology, these discs resist pitch build-up and clogging, while ENDURA-BOND grit-to-backing bond enhances durability. Suitable for use with orbital and DA sanders on wood, metal, and plastics, these sanding discs deliver reliable performance for a variety of projects. Model Number: DCD050320H50G