... 2, Bracket Plate, 3,Riser, 4, Horseshoe MagnetTheoryWhen you put a permanent magnet into the center of the riser, the ... the small fingers to be in a state of irregular arrangement2.2 Install the bar or horseshoe magnet, the ... lines in the space.2.3 Besides, you can get a small magnetic finger to close to the riser ... case it’s damaged3.After it’s used, you do not need to disassemble it; please put is in ...