Gold plated brass. For connecting to RG-8X and RG-58/AU coax cable. Solderless PL-259 connector that goes on without a hitch, without heat and without soldering skills Gold plated brass. For connecting to RG-8X and RG-58/AU coax cable. Solderless PL-259 connector that goes on without a hitch, without heat and without soldering skills. Shakespeare's Centerpin® PL-259 connector means no measuring and no critical stripping of coax insulation, no fussing with the coax's shield, no soldering or tinning. Only requires wire cutters and pliers. Therefore: no making a mess of it.