ePhoto SA35D 5/8-Inch Stud Super C Clamp for Studio Light Support System, Monolight Mount or Studio Light Stands
This is one of the most versatile gadget in any studio. The C-clamp accommodates all sizes of studio products like light stands, extension arm and boom arms. The 5/8" stud is stand for mounting all kind of lights and studio accessories. The 1/4" screw adds more versatility.