Modular design allows flexibility to assemble system in multiple configurations. Unique chaining bracket design creates a strong metal backbone and allows expansion of the system without disturbance of an existing installation. Brackets allow for attachment to ceilings, beams, threaded rods, and drop wires to meet requirements of a variety of applications. Complete horizontal and vertical 1" bend radius control. Cables do not come in contact with metal. Three-level threaded rod bracket. Accepts 1/4" - 3/8" (6.4mm - 9.5mm) threaded rod. Maximum capacity of six J Hooks.