- Each 2 holder packed in a box, you have to solve everything fas screws completely around the holder to remove it from the carton. We have installed 12 boxes, then that is pretty annoying
- The metal screws have plastic washers. Even when tightening the screws warp but then the plastic washer and the holder to enter. So then slipped even the planter. I have my holder additionally secured with cable ties, so that it holds. But this should not be necessary.
Summary, I would the manufacturer / seller actually ask me instead of Platikunterunterlegscheiben to send proper metal washers to ensure that the holder holds.