Neodymium plate block magnets are rectangular-shaped magnets made from neodymium, iron, and boron (NdFeB). They are known for their strong magnetic properties and are the most powerful permanent magnets available commercially.These magnets have a high resistance to demagnetization, which means they can maintain their magnetic strength over a long period of time. They have a high coercivity, allowing them to resist being demagnetized by external magnetic fields.