Use to support wire mesh cable tray from the ceiling using a pair of threaded rods. Installation requires a pair of 1/2", 3/8", or 1/4" threaded rods, four hex nuts, two 1/2" or four 3/8" or 1/4" threaded rod, two hex nuts, one 3/8" or two 1/4" flat washers, one split lock washer and an appropriate anchor/ceiling clamp (ordered separately).