Create the device mount that specifically meets your needs with help from the RAM ROD Spline Post with Knob from RAM MOUNTS. This spline post works together with other optional accessories, such as split-post bases and adapters with female ratcheting connections. One configuration example would be to place this spline post in a compatible base (not included) and gain 4' of height. An optional ball adapter can connect to the male ratcheting teeth to hold a device or device holder (not included).The ratcheting design allows for forward and back tilting at precise angles.