Gator Power 1/4 Sheet Stick-On Premium Sandpaper Sheets are designed to fit Palm or 1/4 Sheet finishing sanders. The heavy duty resin sandpaper resists heat and humidity for longer life. The pressure sensitive holding system holds securely without slipping, tearing, or wrinkling - allowing 100% use of the sander's motion. For use on wood, metal, drywall, fiberglass, or painted surfaces. 5 Pack Size: 4.5" x 4.5" Backing Type: Stick-on Grain: Aluminum Oxide Grit: 60 Grit - Extreme Removal Designed to fit any 1/4 sheet stick-on palm sander. Resin-bonded to resist heat and humidity for longer life For use on wood, metal, drywall, fiberglass, or painted surfaces Pressure sensitive holding system holds securely without slipping, tearing, or wrinkling.