I have three Roof anchors - that have never been used. Top quality engineering, and certified by the manufacturer. Roof anchors are used as an anchor to tie ropes to. They are often used to inspect the exterior of a building, for example. They can also be used to tie ropes and cables to, for climbing practice. I have included a couple of generic pictures, as well as photos of the roof anchors on my shelf Price is $166 each. This is a fraction of the new price.