Tube supports CM of die-cast aluminum have a split clamping point with round or square cross-section that has been partially machined by cutting methods.
The bore at the clamping point is arranged in the plane parallel to the flange faces of the tube support halves. It receives typically available construction tubes with full surface contact via two ribs in the cross-section of the bore.
At the screw points, hex socket cap screws reduce the bore cross-section for clamping.