(Koehn Mfg) No more opening and closing gates. Holds cattle, hogs, sheep and horses like an electric fence. Flexible fiberglass polyethylene arms support electrical streamers (30" in length and 6" apart) and bend in any direction. Metal never touches the tractor or vehicle, as it is covered by the fiberglass/polyethylene. Gate swings closed automatically. Easy to install. Energized with any electric fencer.