The Wooden Camera Ultra Arm Ball with 3/8"-16 Threaded Stud is compatible with the Ultra Ball system and can swap places with one of the original ends with a threaded stud, or you can combine it with other Ultra Arm accessories to create a custom rig. This Ultra Arm Ball is for attaching to 3/8"-16 threaded mounting holes..

• Compatible with Ultra Arm System
• Features 3/8"-16 Threaded Stud
• Non-Slip Rubber Pad