A neodymium magnet or NIB magnet (a variety of rare-earth magnet) is a powerful magnet made of a combination of neodymium, iron, and boron — Nd2Fe14B.

NdFeB magnets are available in a number of different grades and sizes.

Manufacturing Methods

1. Sintered - fine NdFeB powder is compacted in a die and then sintered, fusing the powder into a solid material.
2. Bonded - this is a technique whereby a special form of NdFeB powder is blended with a plastic carrier material, die pressed and then heated.
3. Injection Molded - NdFeB powder is blended with a plastic material and injection molded.  Very intricate parts can be made with this process.

Precautions

NdFeB magnets are prone to oxidation and generally require some form of coating. Nickel plating is commonly used for this purpose.

 Neodymium magnets should always be handled carefully.

Larger neodymium magnets can severely pinch skin or fingers, or even break bones when suddenly attracted to a ferromagnetic object. Operating a large neodymium magnet close to smaller ferromagnetic objects (steel or iron keys, pens, etc.) and larger ferromagnetic surfaces (radiators or cars, for example) can cause injury if flesh is trapped between the magnet and the ferromagnetic object or surface.