Knuckle joint is an important mechanical joint used in structures to connect two cylindrical rods if their axes lie in the same plane. Knuckle joint provides angular movement between cylindrical rods and it is specially designed to withstand tensile loads. Knuckle joint is named so because it can rotate freely on axis of knuckle pin. Knuckle joint has following parts: 1) Knuckle fork 2) Knuckle pin 3) Eye end rod 4) Taper pin 5) CollarAll the above parts are visualized in the exploded view image of knuckle joint. Advantages : 1) It can withstand high tensile loads 2) It has good mechanical rigidity 3) It is easy to manufacture and setup 4) Design is simple and easy. Applications : They are used in 1) Bicycle chains 2) Tractors, trusses 3) Automobile Wipers 4) Cranes , Earth Movers 5) Robotic Joints 6) Structural Members