This is a special ferrite magnet with holes, because the hole in the middle of it is not our common round, but a square, is made by the customer some time ago, belongs to the custom shape ferrite magnet, the magnet uses axial 2-pole magnetization, mainly for motor related, if you are interested in this magnet can contact us!
Axial 2-pole square hole ferrite round magnet pole and sample physical display;