The Guardian Fall Protection "Screw-Down Metal Roof Anchor" is a reusable temporary anchor point that is designed for use with retractable lifelines (up to 50-feet in length). The pinch mounts to standing seams and the legs adjust anywhere between 24-Inch to 36-Inch to fit seam spacing. The Screw-Down Metal Roof Anchor allows the attached retractable to rotate 360 Degree.