Connect another device to your existing RAM® Mount with the RAM-B-273U Ball Base Adapter. This ball is made up of a 1" / 25 mm ball connecting to a 1/4"-20 threaded stud with a length of 1.6" / 4 cm. The threads on this ball replace the bolt in any B-size socket arm (not included), & the ball connects to the middle of the socket arm on the opposite side of the tightening knob. If you are looking to mount more than one device but cannot locate multiple mounting points on your motorcycle or vehicle, this base is the ideal accessory for connecting both devices off of one mounting base. Features Replace the bolt in any B size double socket arm (not included) to add another 1" / 25 mm B size RAM® rubber ball to your mounting setup Included B size 1" / 25 mm RAM® rubber ball allows for connection to any B size RAM® double socket arm, ball & socket technology allows for near-infinite adjustability made from powder-coated, marine-grade aluminum for durability & reliability in the most dem...