Abstract: An adapter plate permits an arm mount with a single abutment plate to support two monitors. The adapter plate includes a first hole, a second hole, and a third hole. The holes may be part of a first set of holes, a second set of holes, and a third set of holes, respectively. Each of the sets of holes is preferably configured in a symmetric pattern compliant with VESA standard configurations for flat panel monitor mounts. One set of holes aligns with the abutment plate on the arm mount and the other two sets of holes align with the two monitors respectively to receive support members, such as bolts, therethrough to couple the two monitors to the single abutment plate on the arm mount.