These are well-made, sturdy metal planters. The brackets are designed to go over the railing but I realized I could secure them to the wood under the railing and these planters are designed in such a way to make this modification possible. There are other thoughtful aspects to their design - for example the weight of the planter is pushing against the bolts that attach the planter to the supporting brackets, meaning they're not likely to loosen and come out over time. I also appreciated the two drainage holes with plugs per planter. I got them in the gray, which is a great neutral color that matches my color scheme.  

The only downside I can think of is the packaging - so much styrofoam for sturdy metal planters unlikely to get damaged during shipping. Cardboard would have been a better choice.