Adhesive magnets are made of thin disc neodymium magnets pre-applied with 3M peel and stick adhesives. It becomes much more convenient for the assemblers to have the products finished.
Magnets have been used for enclosure for a long time. Since neodymium magnets are much stronger than the ceramic magnets, using neodymium magnets for enclosures provides much stronger holding force but a much smaller profile. So neodymium magnets are replacing the ceramic magnets in all areas of magnetic enclosure applications, like jewelry cases, gift boxes, high end folders and binders, and cabinet doors and drawers etc.