Solid balls, smooth with through-hole—fully drilled balls in diameters of 10, 13, 16, 19, 20, 22, 25, 30, 35, and 40 mm. Bore diameters range from 5.5 and 6.0 mm for the small balls up to 10.3, 12.3, and 14.3 mm for the larger ones. The ball is passed through by the rod—the solution for using balls as intermediate elements on railings and lattice rods.