•1. Tighten the upper and lower nuts with a small wrench to fixes them in the cassette.
•2. High hardness metal material,hard nail head,nail head makes the repairer strong fixed,effectively preventing looseness.
•3. Solve the problem that the bottom box cannot be fixed because the socket box is damaged.
•4. Corrossion and rust resistant, durable, no bend, no deformation.
•5. Suitable for type 86 switch socket bottom box.