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.