3M Nylon Insulated Ring Terminal is for wire size of 8-Gauge and 1/4" stud or screw size. There are 200 connectors per package. These are used primarily to hook up additional equipment and to repair a line or harness. The wires are inserted into each end of the barrel and meet at a wire stop in the center. Each end of the Connector is then crimped to give an in-line connection.