Handlebar U-Bolt 1inch Ball Mount with Security Pin-Lock Long Double Arm and Custom GoPro Hero Adapter. (sku 30642)Handlebar U Bolt 1inch Ball Mount with Security Pin Lock Long Double Arm and Custom GoPro Hero Adapter. This mount consists of a zinc coated u bolt base, long double socket arm with a mixed combination 7 pin lock security nut and key knob together with a custom GoPro Hero adapter. The mount is designed with a 1inch diameter rubber ball and socket system that has adjustment points at both ends of the double socket arm allowing for almost infinite