Diablo 5-In. 320 Grit ROS Hook & Lock Universal Sanding Discs, 4-Pack are for final sanding and surface preparation before applying stain or varnish. Crafted from a premium ceramic grain blend, these sanding discs deliver fast material removal and a long sanding life. They feature a 12-hole universal hole pattern that fits all 5- and 8-hole sanders, making alignment quick and easy. The hook and lock backing ensures a consistent, secure connection for effortless attachment and removal. Designed to last longer, these discs include Clog-SHIELD technology to reduce pitch build-up and clogging, along with ENDURA-BOND grit-to-backing bond for enhanced durability. I for use with orbital and DA sanders on wood, metal, and plastics. Model Number: DCD050320H04G