The RAM Suction Mount Arm and Round Base Plate attaches with the suction cup base to the windshield of your vehicle for an easy and safe way to view your electronic device. RAM's rubber ball and socket technology allows for almost adjustment to a perfect viewing angle. Made from high quality materials ensure your electronics are safe, secure, and within easy reach. RAM's patented design also dampens shock and vibration helping to extend the life of your mobile device.Standard length 1" ball arm, Twist Lock suction mount and round base plate.When attaching the suction base, it must be clean and dry and so must be the surface it affixes to. An alternative method is to attach an adhesive rose pad the RAP-350 on to the dash area and fix the suction base onto it.