Kondor Blue Magic Arm Center Clamp, Clamp Only, BlackKondor Blue Magic Arm Center Clamp, Clamp Only, Black Magic Arm Center Clamp (Clamp Only) Key Features Premium Bearings allow for smooth tightening Large Thumb Knob for easy use Aerospace Grade Aluminum Custom build your own Double Ball Head arm with this center clamp Enables you to clamp any ball head accessories Compatible with most ball heads in the industry