12mm diameter tube holder for multirotors

This is an arm holderfor 12mm diameter carbon fiber tubes, it is meant to be at the base of the arm, sandwiched between fiberglass/carbon fiber plates to allow the arm to be folded. The wires from the motor can be ran inside the tube and exit in between the pivot of the holder.
Straight out of the printer the holder has a very good grip on the tube, but for extra caution glue could be used to prevent any slipage.

I haven´t tested it in flight yet, lots of other projects waiting in line!