Love these lights! They seem to be very well made & durable. Very easy to install! Concrete/mason screw bolts are included. We put them on our pier & used stainless screws instead.FYI- our set has a “switch” on the back. Some don’t apparently. When ours didn’t come on at dark, we uninstalled & pressed the switch (more like a button) again until it clicked, then boom! Beautiful lights! Since installation was so easy (with regular screws) it wasn’t a big deal. We love them!