RAM Handlebar U-Bolt Double Ball Mount for Garmin eTrex Legend + More (RAM-B-149Z-GA16U) (sku 54110)The RAM B 149Z GA16U consists of a zinc coated u bolt base, double socket arm, diamond adapter base and custom high strength composite cradle for the Garmin eTrex. Designed into the mount is a 1" diameter patented rubber ball and socket system with adjustment points at the base and cradle. With a twist of the arm knob, you can move the Garmin eTrex mount to your optimum viewing position. Included in this package is hardware that will accommodate rails