There is a large selection of magnets and magnetic accessories . The most popular are ordinary ferrite or ceramic magnets, which have a standard force of attraction. There are also more and more neodymium magnets, mainly containing neodymium, iron and boron (NdFeB). Neodymium magnets are very strong - even ten times more than regular ferrite magnets. This feature makes them vey useful also in the mechanical, electronic and many other industries. They apply also in offices: to stick cards, information on magnetic boards or placing advertisements.