DBI/Sala Sealed SRLFEATURES Sealed Fall Protection and Rescue Device This self retracting lifeline (SRL) mounts to your tripod to provide fall arrest capability as well as emergency retrieval. By simply turning the handle the attendant can raise or lower an injured person. Incorporating a revolutionary new concept, where the dynamic components are environmentally sealed, this sealed SRL isolates the motor spring, brake, and other components from foreign elements,