All accessories for the 3 and 4 Way Clamp System have a proprietary notch that slides into one of the mounting locations and then is secured by turning the locking collar. It is 108mm long.
Kupo 4.25" (108mm) Long 5/8" (16mm) Stud Threaded Locking Collar
Constructed from solid steel with chrome plated surface treatment
Quickly attaches to any of the mounting locations on either the 3 Way Clamp (KCP-930P) or 4 Way Clamp (KCP-950P)
Accepts any light fixture or accessory with a Baby (5/8"- 16mm) receiver
