Duplex clamp conduit connector. Used to terminate two runs of AC, MC, FMC and RWFMC to a 1/2 In. knockout in a dry location box or enclosure. These die-cast connectors are a single set screw clamp type for easy installation for aluminum or steel cable and conduit. For aluminum or steel 14/2 - 10/3 AC and MC (MCI, MCI-A, HCF), and 3/8 In. FMC and RWFMC.