Universal Joint Assembly also known as a U-joint, is a mechanical coupling used to transmit torque and rotation between two shafts that are not in a straight line. The U-joint assembly consists of two yokes that are connected by a cross-shaped bearing, which allows the shafts to rotate at different angles while maintaining a constant speed. Universal joint assemblies are used in a variety of applications, including automotive drivetrains, industrial machinery, and marine equipment.