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 4.5kg, at maximum extension. The locking system is simple to operate & adjust & the arm features a 16mm hexagonal/universal spigot on the bottom end & a 16mm spigot 3/8 inch light attachment on the top which attaches to the included camera mounting plate which features a 16mm spigot & camera attachment.