"The Assembly Tool is a hard plastic material that is very handy for both the assembly of custom male and female wires, making it easier for veteran users to quickly and easily tighten and take apart the connectors. Use the gripping hole in the middle to grip the base of the connector. Rotate one of the tools while keeping the other still to finish tightening the connector. Align the assembly tool with connections along the middle. Gently press down and pull the connections away from each other. "  Very handy for the assembly of custom solar panel connector wires For breaking connections after they have already been locked together Hard plastic 100% compatible with solar panel connectors We want you to be happy with your purchase. If for any reason， Welcome to contact us via email, we will reply to you within 24 hours