Tool assembly and method for measuring at least one facial feature of a patient

A tool assembly comprising:

• a primary removably attachable tool comprising a first slot, a second slot, and a slidable primary upper plate removably attached to the second slot, wherein the slidable primary upper plate is configured to slide along the second slot;
• a secondary removably attachable tool comprising a third slot and a slidable secondary upper plate removably attached to the third slot, the slidable secondary upper plate configured to slide along the third slot,
• wherein the secondary removably attachable tool, attached to the slidable primary upper plate, is configured to slide along the second slot, and
• wherein the first slot and the second slot of the primary removably attachable tool are parallel to each other, and wherein the third slot of the secondary removably attachable tool is perpendicular to the first slot and the second slot of the primary removably attachable tool.