The Adjustable Height 3M™ DBI-SALA® FlexiGuard™ C-Frame System helps protect workers from falls while providing a large working space. The rigid rail is made from durable extruded aluminum and is rated for use by up to two workers at once. Sitting atop pneumatic wheels, This mobile safety system can be easily moved from one job to the next by manual means or with the assistance of a tow bar and service vehicle.