DBI-SALA Roof Top Freestanding Counterweight Anchors Installs to flat or up to 5 degree sloped roofs. Non-penetrating design simply sits on working surface, reducing the possibility of damage for peace of mind. Energy absorbing design protects the worker and the structure in the event of a fall, limiting fall arrest forces to safe levels. Complete with sixteen 45 lb. (20 kg) counterweights - includes four PVC coated base plates. Integral carrying handles for easy transport Pack of 1