The manfrotto 396b 3 3 section double arm is a lightweight double articulated arm which can be used to support studio equipment weighing up to 45kg at maximum extension the locking system is simple to operate and adjust and the arm features a 16mm hexagonaluniversal spigot on the bottom end and a 16mm spigot 38 inch light attachment on the top which attaches to the included camera mounting plate which features a 16mm spigot and camera attachment