a sling system comprises a plurality of sling units each including a synthetic fibrous sling and a roller unit which has one or more spool - shaped rollers . the system provides for lifting a load in equilibrium and maintaining the load in that position or be rotated or tilted between horizontal and vertical positions . the system provides for a plurality of attachment points of the sling units to the load , and the sling units and may be set up as a single array or a multiple array depending on the type of load being lifted , transported and positioned . endless and continuous loop synthetic slings and multiple roller units are used in sling units and provide for uniform and equal distribution of the load throughout the sling system . the spool - shaped rollers may be molded of a rigid plastics material with each roller having end flanges to confine the synthetic sling .