There are two ways to achieve the kind of features: 1, the use of electromagnets 2, is the use of two magnets magnet misalignment, you should have seen the first two kinds of methods are used to achieve. I.e., two parallel bar magnets suction together (side by side as two chopsticks in a), which is equivalent to a magnet (one of the N and S poles respectively attracting the other one of the S and N poles), when the side of the lever is pushed to the other side, and in a case of two bar magnets dislocation occurs (block N and S poles juxtaposed against another piece of the N and S poles), the entire magnet magnet magnetic sound disappears, you can remove the plate. Magnets have a magnetic material, while iron is ferromagnetic material, they are able to attract, ferromagnetic material such as nickel, iron, cobalt, has ferromagnetism in the eighth group of chemical elements in the table, so you can attract, nickel coin is made, it can be. And the silver is not, an eighth group, no ferromagnetism, magnetic materials can be attracted. So not attract a magnet silver. Hardware _ _ Guangdong magnet magnet magnetic new Xin Tong provided by the Dongguan City, Tong Xin magnetic Limited. Xin Tong, Dongguan City, the new magnetic Limited (www.dgxtxmagnet.com/) strong, credible, in Dongguan, Guangdong magnetic materials industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead the new Tong Xin magnetic and you hand into the brilliant, for a better future!