The Hex-Lok connector has a hex head design that 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 600V (volt) maximum with a 1000V maximum in lighting fixtures luminares and signs. CSA (Canadian Standards Association) and UL (Underwriter s Laboratories) listed. WARNING: This product can expose you to chemicals including DEHP which is known to the state of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov -