Systems, apparatuses, and methods provide for a tool to support components on a common hinge line axis. The tool includes a first pin and a second pin coupled in coaxial alignment with each other, defining the common hinge line axis. A first shouldered hinge pin is slidably disposed on the first pin and a second shouldered hinge pin is slidably disposed on the second pin. The first and second shouldered hinge pins allow translation along the common hinge line axis of the supported components when coupled to the first and second shouldered hinge pins. The first and second pins are disposed within a ball and socket joint, which enables pivotal adjustment of the common hinge line axis while maintaining the first and second pins co-axial to each other during adjustment of the common hinge line axis, to aid fit and assembly of the supported components to a mating structure.