I purchased this handrail kit online through VEVOR. The installation was straight-forward and it is sturdy and attractive. The adjustable angle allows the system to work with stairs up to a 30-degree incline. The only thing I would caution other customers on is that the online instructions call for 1/2" (13mm) holes drilled in the concrete for the expansion anchors. That hole size is too large and will not work. The anchors that come with my kit were 10mm. I ended up going to a hardware store and buying my own anchors and masonry bit to match the anchor size (3/8").