Micro block magnet Adopt watch stone tooling technique Tolerance within 0.005mm to 0.02mm Option materials: SmCo, NdFeB, etc. SmCo Micro Block MagnetFeatures: 1, Micro block magnet, which is made with watch stone tooling technique, often is used in medical treatment, communication and precision measurement and more. 2, SmCo, NdFeB, Ferrite, AlNiCo, artificial jewelry, crystal, ceramic and other ...