Diablo Hook & Lock 5-In. 220-Grit ROS Sanding Discs, 4-Pack is for final sanding and surface preparation before applying stain or varnish. Crafted from a premium ceramic blend, these sanding discs provide fast material removal and a long sanding life. Designed with a 12-hole universal hole pattern, they easily fit all 5 and 8 hole sanders, ensuring quick and precise alignment. The hook and lock backing allows for easy attachment and removal, maintaining a consistent and secure connection throughout your sanding tasks. Featuring Clog-SHIELD™ technology, these discs resist pitch build-up and clogging, while ENDURA-BOND™ grit-to-backing bond enhances durability. They are suitable for use with orbital and dual action sanders on wood, metal, and plastics. Model Number: DCD050220H04G