one with holes on a round magnet, and the other with holes on a block magnet.
The anti-counterfeit holes on the magnets are compatible with screws of M3, M4, M5, M6, M8 and M10 sizes, allowing for secure, allowing for secure mounting to various surfaces. In terms of polarity, there is no polarity difference when attracting steel surfaces. However, if magnets attract each other, the north and south poles should each occupy half the space. When using with other magnets, matching poles must be selected.
NdFeB permanent magnets possess excellent magnetic properties and are widely used in electronics, electrical machinery, medical devices, toys, packaging, hardware machinery, aerospace, and other fields. Common applications include permanent magnet motors, loudspeakers, magnetic separators, computer disk drives, and magnetic resonance imaging equipment.
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