Wooden Camera Ultra Arm Ball with NATO Rail. The Wooden Camera Ultra Arm Ball with NATO Rail 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 features a NATO rail with two safety pins to stop your NATO accessory from accidentally sliding off the rail..

• Compatible with Ultra Arm System
• Features NATO Rail
• Safety Pins on Each End of NATO Rail