Please note that the metal dowels are solid. There are a couple of things to look at if the shelf starts to slope over time
1. Installation – The shelf is only as good as the installation. We recommend always mounting into a wall stud when possible. If the shelf is not anchored into a stud then over time it can begin to sag (pull away from wall) especially if the anchors were not installed properly into the dry wall.
2. Weight Limit – If too heavy of an object or objects are placed on the shelf than it can cause the shelf to pull away from the wall. This goes back to anchoring the shelf to the wall studs. If this is done properly than there should not be any issues.
Please let us know if you have any other questions or concerns. We truly appreciate your business