HoverGrid™ frames are interlocking assemblies that, when joined together, form a rigid grid-work for attaching LCDs. Frames interlock vertically, up to eight monitors high, and horizontally as many monitors as you wish. The HoverGrid™ system comes with individual model-specific frames, a choice of 1, 2 or 3-wide overhead rigging beams, shackle suspension mounts and joiner brackets, back-braces and quick-connect aircraft pins. DMX-512 Winch Wahlberg winch CueLUX from lift-it better practice is to use swivel hoist ring: