The hex head design allows for automatic or manual driven installations with a 7/16 in socket. These multi-range copper-to-copper connectors cover most everyday electrical applications. The square wire spring grabs and holds the wires for a secure connection. The long skirt covers stripped wires and the streamlined design provides for compact installations. These connectors are rated at 600 V maximum with a 1000 V maximum in lighting fixtures, luminaries and signs.