Sand Sht4.5x5.5 220g 6pk Premium aluminum oxide blend - a superior quality formulation designed for fast material removal and Clog-SHIELD, high performance Separate coating that reduces pitch build-up and clogging for maximum ENDURA-BOND, a specialized high strength resin provides superior grit-to-backing bond for extreme du Recommended use - removing minor imperfections and initial sanding between paint/stain coats Tool usage - 1/4 sheet palm sanders Materials - wood, metal and plastics