RAM® Double Ball Mount with 11mm Bolt Head Adapter RAM-101-247-4-ZE9U 7" square base with the

7" square base with the universal AMPS hole pattern

There is even a place for a small lock to serve as a theft deterrent

Mount the antenna on a horizontal or vertical surface or anywhere in between

you can move the flat surface eTrex mount to your optimum viewing position

RAM® Double Ball Mount with 11mm Bolt Head Adapter RAM-101-247-4-ZE9U 7" square base with theThe RAM B 179U consists of a 1" diameter ball base, connected to a 2. 25" x 0. 875" base with 11mm hole, double socket arm and diamond base adapter. This mount is often used on motorcycles, attaching to the mirror frame, most commonly found on BMW motorcycles. as well as many handlebar pinchbolts with a washer (base is 5mm thick). The 2. 43" x 1. 31" diamond base contains two holes 1. 912" from center to center, matches the industry standard AMPS hole