PURPOSE: A cut out switch is provided to firmly fix the combination part of fittings and a COS(Cut Out Switch) body magnetic part by using a screw type connecter. CONSTITUTION: A magnetic insulator(110) includes a first coupling part(210) combined with a bracket connection fitting(150). The first coupling part is formed as a groove with screw threads. The first coupling part is formed on the center part of the magnetic insulator. The first coupling part is formed by anti-corrosion materials. The bracket connection fitting includes a second coupling part(220) combined with the magnetic insulator. The second coupling part is formed on one side of the bracket connection fitting. The bracket connection fitting is rotatably combined with the magnetic insulator.
