The RAM-B-180U consists of a 1" diameter ball base with 9mm 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. The 2.43" x 1.31" diamond base contains two holes 1.912" from center to center, matches the industry standard AMPS hole pattern and will connect to a large variety of RAM Mount and third party cradles. The mount is designed with a RAM 1" diameter patented rubber ball and socket system that has adjustment points at both ends of the double socket arm this allowing for almost infinite adjustment and perfect viewing angles.