A mechanical knuckle joint is a robust connection used to join two rods under tensile or axial loads, commonly found in automobiles, linkages, and structural applications. In SolidWorks, it is designed using Extrude, Revolve, and Assembly features to create the fork, eye, and knuckle pin, with motion analysis to test flexibility and load capacity. Typically made from mild steel or alloy steel, it ensures high strength, easy assembly, and efficient load transfer in mechanical linkages and structural frameworks.