The Model 17 Adjustable Spreader Lifting Beam is designed to use as a 2, 3 or 4 point lifting or spreader beam.  This multible use lifter can convert easily by adding top side or bottom side rigging. See sample here.  Unique design which allows for both wide and unbalaned loads. Of most importance is its low headroom design.  2 shackles are included. Ask about the optional pair of adder Swivel Hooks and top Chain Sling Rigging.