Ball-head bolts—ball and shank in a single component. Five designs with ball diameters of 10, 13, 16, or 19 mm (smooth or hammered) as well as a flat design with a washer diameter of 22 mm. Shank diameters of 5.0 or 5.5 mm with shank lengths of 20 or 50 mm. The bolt is inserted and welded—without separate ball assembly.