Tips & Hints - To replace the hook material on your random orbit sander: Sand away any remnants of the 'hook' material by placing some sandpaper on your work bench...sanding until the pad is clean and smooth. Apply the replacement conversion disc.
 
Apply contact cement around perimeter of new discs for extra adherance. To remove old conversions.....heat with a hair dryer until the glue has softened.....then carefully peel off.