Its made of granite. The brackets come with it along with stainless hardware. There are a couple of ways to put these in. My stone place has one just sunk 2.5 feet in the ground with no concrete. They have had their semis hit it and it just dis lodges it but it does not break it. You can concrete them but they will snap. We close just to put this in with out concrete in cause the plow hits it. Believe me its not going anywhere.