This closed end crimp connector allows you to join together multiple wires at once. This is particularly useful in areas where resilience against vibration is especially crucial. It is made for smaller gauge wire and provides a way to make a simple connection for uses in electrical wiring. Wire connectors of this type are sometimes known as crimp connectors, because crimping the insert helps to hold the connection in place. The nylon covering acts as insulation for the copper insert. The tin plating on the insert helps provide protection from deterioration.