3M 6″ HOOKIT LOW PROFILE BACKUP PAD – 3M 6″ Hookit Low Profile Specially designed for use with 6″ Hookit™ discs. Low profile design provides better leveling and faster removal rates when flat sanding. Pad is made with a medium density foam and has a blunt edge for edge durability. Has 5/16-24 EXT threads. Product is sold by the each.