This is a good product. I installed on stairs with TREX decking fully supported underneath with 2 by 6s. The installation was easy enough but the screws that came with it were either for masonry or metal. I did not use the expandable bolts for masonry but tried using the self tapping other screws that were supplied and they did not work on the TREX and wood 2 by 6 underneath. So I bought 8 Lag Bolts and they worked fine.