By tightening the screw on it, the post can be compressed and kept at the desired height on the post holder.
The post collar OMBK1 is fitted by locking a 12.7 mm diameter post with a thumb nut. It provides the possibility to rotate the post without changing the height of the mounted component by placing the cover on a post so that it is fixed on the post holder. Furthermore, Using a 1.3 mm hexagon wrench, this adjusting screw allows it to adjust a base height of approximately 6.4 mm without turning.