The magnetic field of bi-polar magnets have a greater "reach out" than that of flat-faced electromagnets. For this reason, they perform better than equivalent flat-faced magnets when operating through an air gap or any type of non-magnetic material between the workpiece and the magnet.

Bi-polars, due to their two extended poles, are designed to handle round parts, parts with uneven surfaces, and odd-shaped parts. Contoured, auxiliary pole shoes can be added for better contact with the workpiece.

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