The RAP-B-166-TO8 Composite twist lock suction cup mount consists of a 3.25" suction cup locking base and diamond plate end. The mount is designed with a RAM 1" diameter patented rubber ball and socket system that has adjustment point at the cradle plate and base. Simply attach the suction cup base to the windshield of your vehicle for an easy and safe way to view your GPS in your vehicle. Rubber ball and socket technology allows for almost infinite adjustment and perfect viewing angles. High quality materials ensure your GPS is safe, secure, and within easy reach. RAM’s patented design also dampens shock and vibration helping to extend the life of your mobile device.