DIN 71802 steel angled ball joints consist of a ball socket DIN 71805 and a ball shank DIN 71803. The angle of rotation for the safety catch versions is 15, and for the versions without safety catch is 18. For assembly, the ball is pushed through the circlip which acts as a retainer. Should the retaining force between the ball and socket not be sufficient (see table), it can be increased by adding a safety catch, which can easily be installed. To protect the ball point, a dust seal can be added.