Hollywood Baby Extendable Offset Arm (Part# 430126) by Mathews Studio Equipment. Offset Arms ﾗ Offset Arms are a convenient tool when a lighting fixture needs to be placed off center, for the purpose of hiding the stand behind a set wall, or coming over the top of the set. The Baby Extendable Offset Arm terminates in double 5/8" pins and the Junior Extendable Offset Arm terminates in a single 1-1/8" Junior Posi-V-Lock Receiver. Both extend from 18" to 25". Weight: 3.5 lbs.