Speccifically designed for, but not limited, to the Fire/EMS market, Gamber-Johnson's 12-inch locking slide arm can be used to mount any Gamber-Johnson computer cradle or docking station. The 12-inch locking slide arm has 6 locking points, 1.81-inches apart and can rotate around 360-degrees locking at every 22.5-degrees. By simple pulling the front lever out, rotating to the desired position and then releaseing the lever, the arm is easily rotated. The Motion Attachement is also features full rotation allowing for full maximum flexibility in computer palcement and also tilts up to 90-degree fore, allowing the computer mount to be used as a tablet if desired.