Countersunk magnets are incredibly useful and popular and these 10mm (0.39") diameter countersunk rare earth magnets are no exception. They are ideal for furniture making, hanging artwork and keeping doors or drawers closed. Every magnet has a central countersunk hole for easy fixing. In this section you can chose from super strong neodymium magnets or samarium cobalt magnets that while not quite as strong as neodymium magnets they have a much higher maximum operating temperature.