Other similar small ball heads have no matt polished chrome surface as this nameless part, but are and keep a little better at the same load. Examples include the spherical head 'Cullmann CB2', or rather the 'Novoflex Neiger 19 Ball Head' - at a significantly higher price! Yet even here a Nachkippen programmed if you would overload these tripod heads with an SLR. An expensive and heavy DSLR or even a slight indeed, but not quite cheap GoPro should be mounted on a ball or swivel head same league SAFE.
Why now and yet thoroughly deserved five stars? Because of this mini tripod head is ideal on a small compact camera, a flash device in slave-readiness (to be then required hotshoe / flash bracket eg by Mengs.) Or a microphone to attach - and including then (e) Terminal / tripod from Manfrotto, Cullmann, Hama, Gopro or the other.
So you first turn the external thread of the ball head into the unit until it stops, then it is fixed with the threaded plate by screwing against the unit. The fact that the plate is made of plastic, is standard in this price range and works.
I do not recommend oiling the chrome ball head or fat, then by the slip slope is increased. And you should not tighten with the pliers, but adequate hand sure the thumb screw.
I speak for this ball head for fixing lightweight devices have a strong buy recommendation!