Just as dominoes have two separate squares, a domino module is made up of two building blocks or cubes. The cubes can be flexibly joined to form modules as required. Therefore, a Han-Modular® Domino module enables the transmission of power, signals, data, or compressed air, as male and female contacts can be combined into one domino module. Each domino module consists of a cube with a small tab and a cube with a large tab. Overall, the number of required interfaces per unit is reduced. The connection technology becomes smaller and more lightweight, as more modules and module types than before fit into one connector.