Rzeppa Constant velocity joints

Hi folks,
Rzeppa Constant velocity joints are used when the angle of drive more than 30 degree .these types of joints are mostly used in front axle drive vehicles. Constant-velocity joints allow a rotating shaft to transmit power through a variable angle, at constant rotational speed, without an appreciable increase in friction or play. This joint has the input of a half shaft. The shaft is spilned at one end on which the inner spherical socket sits. The inner spherical socket and the outer spherical socket have grooves in which balls move. The outer spherical socket is connected to the output shaft. These joints are very strong, and are usually highly over specified for a given application. Thanks you.