... 3. more size can be custom-made round magnets with screw holes material: sintered NdFeB magnet;rare earth permanent magnetsshape: according ... disc, thick cylinder, ring (include sink hole), segment, tile, and ball types of magnets, and also include special magnetic-bar, magnet ... RoHS certified.5) Use of magnetOur magnets are used for motor speaker, hardware, package, cabinet lock ,door lock and health ...