Neodymium Countersunk Magnets and Counterbored Magnets. Great for many applications including door/cabinet closures, hanging art on a wall, and more! Neodymium Countersunk magnets are extremely popular neodymium disc magnets with a countersunk central hole to allow the magnet to be easily fastened into place for a temporary or permanent fitting. All our neodymium countersunk magnets are available with a countersink on the north face of the magnet or on the south face.