The Junior to Baby Pin Adapter enables you to mount a light fixture or accessory with a baby 5/8" (16mm) receiver to any stand with a junior 1-1/8" (28mm) receiver such as the Kupo master c- stand with turtle base or Runway Stand Base (350). It's perfect for mounting a light fixture or accessory low to the ground. Solid steel construction gives it superior strength. The knurled necks for maximum friction. The bottom of the adapter has a safety pin hole drilled through it if you are hanging it from a coupler or clamp with a junior receiver . (A.k.a 750 male to 2K male spigot/ butt plug)