The Pilotfly MagiCUBE 4 Light-Clip Set is designed to work with AtomCUBE light fixtures. This lightweight set includes two aluminum alloy Edge Clips and one Center Clip, and it enables the secure joining of four AtomCUBE fixtures (not included) together, with the fixtures stacked two horizontally and two vertically. The Edge clips provide a single 1/4"-20 and 3/8"-16 threaded mounting hole so you can attach your lights to stands or other supports, while the Center Clip provides no mounting holes.