These Terminal Heavy Duty Electrical Lugs are great for inverters, Battery and automotive applications. Can be connected to a cable such as a battery cable by simply stripping insulation from the end of your cable, placing the lug over the exposed cable and crimping the barrel tightly and securely to the end of the cable. They can also be soldered on if you prefer. These lugs are made of tin plated copper which offers excellent conductivity for any application you my have.