Description Reviews Lake Country 3 Inch 5/16" x 24 Dual Action Hook & Loop Backing Plate 43073DA Molded Urethane Hook and Loop Backing Plate - 3 inch Fits on 5/16" x 24 thread. Perfect for Porter Cable 7424XP. For use with 3 inch to 3.5 inch buff pads. 5 good product Posted by AMobileDetailing on Apr 22nd 2018 Works exceptionally well. Thank you!