Always have a locking knob in your kit for the Arm X1 stabilizer arm post with this Arm Post Locking Knob from SmartSystem. The knob secures the 5/8" arm post, as well as other size arm posts, on the end of the Arm X1 stabilizer arm to keep your gear securely mounted.
Compatibility
SmartSystem Arm X1 stabilizer arm
EAN: 8051411192121