For flat roof scenarios when you cannot penetrate the roof, or when a worker needs to access an area that gets infrequent use. Sixteen 50-pound plates assemble into a steel frame to create the anchor, making it possible to be brought in and assembled by one person. Requires no drilling: non-penetrating, free standing unit.Rated for one worker for fall restraint applications.Rated for one worker for fall arrest applications.Pivots 360.Anti-slip tape on bottom of base plates.Can be left intact and moved by crane or forklift.Total assembled weight is 825 lbs.