this werner reusable roof anchor has a pivoting design, which makes for easy transport, installation, removal, and storage. It is meant for temporary use on wood rooftops, and fits up to 12/12 roof pitch. It features a versatile d-ring for easy connections. It is made of weather resistant plated steel and fasteners are included. features: pivoting design makes for easy transport, installation, removal, and storage fits up to 12/12 roof pitch d-ring for easy connections made with weather resistant plated steel comes with fasteners included use only 3in #12 hex head stainless steel screws to install the anchor 6 per leg into the rafters and sheathing. Install all 12 screws