The RAM Double Socket Arm allows you to attach two RAM mounting brackets to each other. The unique RAM ball mount allows for near-infinite adjustability. The easy adjust knob allows for near-infinite adjustability for your connected device. Features Low-profile design Average weight .31 lbs.Attaches to RAM ball component, including mounting bases and device holders; double ball and socket technology allows for near-infinite adjustability of your RAM mounting systemMade of powder-coated, marine-grade aluminum for durability and reliability in the most demanding environmentsBacked by a lifetime warranty by RAM MountsCheck charts below for compatibility and size guides