The RAM-B-138, universal mount consists of a flat surface drill down round base and universal diamond plate. The hole pattern found on the diamond plate will connect to many RAM holders, as well as third party holders including mounts with the industry standard AMPS hole pattern. Designed into the mount is a 1" diameter patented rubber ball and socket system with an adjustment point at the base and holder. Rubber ball and socket technology allows for almost infinite adjustment and perfect viewing angles. High quality materials insure your device is safe, secure, and within easy reach. RAM's patented design also dampens shock and vibration helping to extend the life of your device. Material: Powder Coated Marine Grade Aluminium Ball Size 1" Rubber "B" Ball Size Components RAM-B-201 RAM-B-202 RAM-B-238