It is very simple to use:
1.Rotate the meter seal on the blade clockwise until the hole of the shell and the hole of the inner core correspond. Position the seal wire from the hole of the bottom shell through the hole of the inner core to the other side. Rotate the rotary knob more than one circle clockwise to lock it.
2.Rotate the blade to the position when the above hole of the seal corresponding to the round hole of the inner core, then pass the other end of the seal wire through the hole of outer shell and the hoe of the inner core to the other side, pull it out.
3. Rotate the blade clockwise more than one circle to achieve the purpose of locking and fixing the seal wire. The seal is completed and cut off the rotary blade.