Neodymium iron boron magnets (Neo, NdFeB or NIB magnets) are the strongest type of permanent magnets commercially available, with magnetic properties that exceed alnico and ceramic(ferrite) magnets. Sintered NdFeB magnets offer extremely high energy product for their size, they have a high magnetic remanence and much higher coercivity than other permanent magnets. They are available in a wide range of shapes, sizes and grades at relatively low prices.
Read the magnet safety warnings before you purchase or use them: Magnet Safety WARNING! (appliedmagnets.com)
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