Spool Holder CAP

This part helps to the spool a free rotating without transferring rotation to the axle of the spool stand avoiding movement of the stand, or that spool fall out of it.
This part also helps a good concentricity of the spool with axle stand, with this a free rotating of spool is done.
The thread in the part helps to apply correct torque pressure in case of different spool size, torque always could be adjustable.
Axle stand, never will rotate again.