Leaf Style Air Expanding Shafts is a cylindrical inner body having a longitudinal axis and first coupling elements. Its rugged construction and design are available for any diameter or length, in steel, aluminum or lightweight carbon, with special designs available for heavy duty and extra lightweight applications. The longitudinal axis is to increase an outer diameter of the shaft when in a first configuration, and allow the leaf elements to move radially inwards relative to the longitudinal axis to decrease the outer diameter of the shaft when it is in a second configuration.