SM6816

6816

SmartSystem

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