HobbyKing JST-SH Connector Crimping Tool Hobbyking Electrical Connector Crimping Tool - Perfect for servo lead connectors and some other RC crimp connectors. The best way to connect JST-SH plugs is to crimp them and with this tool it couldn't be easier. It has two sizes in the jaw to help you set the wire initially and the second to finish the crimp. What makes this crimper so easy to use compared to other inferior crimping tools is its rachet action which allows for a slow steady action, just what you need when dealing with little wires.