Read a lot reviews on all different types of flower box brackets. Finally chose this one and I'm very happy! We have trek decking and our railings are very wide, tried many different brackets from a lot of stores only to return them :-( .....these brackets fit perfect with some to spare would definitely recommend and will be replacing my other ones with these.
My wife and I put up two of these on our 3rd story balcony a couple of weeks ago. I lived in Germany and wanted to mimic the balcony flowers you would see everywhere in Bavaria. This product works perfectly! We have a very wide railing of 5 inches.
The good thing about the l brackets is they can be flipped either way in order to accommodate any size railing. This was a very big plus for us that worked out really well when we almost thought it wouldn't fit.
The white color allows for the flowers to display all their beauty with little distraction. The flower box we ordered on amazon fit perfectly right inside the wire frame.
The extra backstop works perfectly to allow the planter to sit up and not droop down. This little piece was a much needed addition and would otherwise make it very less stable. Now it sits level and straight.
The only thing with turning over the bracket and using the longer edge to fit the railing, is that it now gives you a smaller lip that hangs over the rail which gives most of the support. With all the weight from soil and flowers, this is a lot of strain in one place. So in order to completely feel comfortable and to create a second failsafe (we are on 3rd floor. don't want it falling from bad weather or any reason) I used zip ties to reinforce the point. I put the ties through the opening and connected to railing. They are practically invisible but now let me know that those flower boxes are going no where, regardless or wind and rain. If you are just installing on your deck or something, i don't think t would be necessary. But for safety, I used the zip ties.
Lastly. I just love them. They make our balcony look so beautiful now and just love coming home to this balcony of flowers. A little taste of beautiful Bavaria every day. Don't hesitate to buy this product.