Made from high quality materials to 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. The RAP-B-138 is designed to be a universal mounting are for both RAM and non-RAM designed products. The hole pattern found on the Diamond Plate will connect to a large variety of third partyÂ holders and mounts. The base has a 1.0" diameter Rubber Ball connected at right angles to a 2.5" diameter Plate. The plate has 4 holes that match the universal AMPS hole pattern. Components: RAP-B-201, RAP-B-238 and RAP-B-202.