By turning the handle to rotate the magnet inside. When the two poles (n or s) of the magnet are in the direction of the bottom, that is, the n or S pole positive of the magnet of the magnet is magnetized, it is magnetized. Essence When the pole of the magnet is in the horizontal direction, and the middle of the NS is facing the soft magnetic material base (the middle of the long strip magnet is only very small magnetic, it can be regardless of) Without magnetic force, you can easily remove it from the surface of the steel.

This magnetic watch seat uses two characteristics:

1. The characteristics of magnetization and degeneration of soft magnetic materials;

2. The intermediate magnetic field of the strip permanent magnet or the constant magnetic magnet is extremely weak and the magnetic field at both ends is extremely strong.