Wire connectors hold 4-conductor wires securely in grounded j-box installations. Wire nuts come in handy for J-box installations, but wires can pull out accidentally, leaving you without a secure connection. Guarantee perfect four-wire grounding installations every time with this 100-pack of 4-Conductor Ground Wall Nuts. Safe for use with 18- to 12-gauge solid wire or 16- to 12-gauge stranded wire, these wire connectors will hold wires securely so they cant pull out accidentally. A transparent housing provides easy inspection. Installation is simple. Strip 7/16" to 1/2" and insert into a wire connector. To remove solid wire, just pull and twist. If the wire is stranded, cut the wire, discard the connector and restrip the wire to insert it into a new connector. These 4-Conductor Wall Nuts are for grounding terminations only.