Mainly used in conjunction with stands or clamps, Manfrotto Articulated Arms and attachments enable accurate positioning of lighting and effects. The 196AB-2 Single 2-Section Arm is a single articulated arm with two sections. The top attachment is a 16mm spigot 3/8" light attachment. The Bottom attachment with a 16mm spigot with 1/4" thread, (compatible with light attachment Superclamp).