DBI-SALA's trolley is designed and engineered for ease of use and superior performance. Non-corrosive double-shielded wheel bearings are maintenance free. Use in combination with one of their self retracting lifelines. Glides effortlessly along the beam and provides horizontal mobility and fall protection. It is easy to install and operate, and combines light weight and high strength (5,000 lb. Min. tensile strength). The Trolley Anchorage Connector is intended for use mounting self retracting lifelines on horizontal I-Beams. Easy to use design makes this Trolley Anchor attachable anywhere along beam including midpoint.