Typically, this type of Magic Arm has a center joint with a central clamping screw, which also clamps 2 ball joints at the ends when tightened. The center joint usually only has the degree of freedom around 1 axis and since then usually also latches while the ball joints at the ends can be freely rotated in all directions. If you attach the Magic Arm to one end, it can pick up something, such as a camera, a flash or a light.
This set includes a pretty good clamp, a threaded socket with the “small photo thread” (1/4-20 UNC) as well as a connection for attachment to a hot shoe. This gives you an universal set with which you can attach or connect all kinds of photo equipment.

In my opinion, the workmanship of all parts is impeccable. Everything is made of metal, sturdy, visually beautifully coated and really well made. All edges are neatly chamfered, clean strands. The rubber pads on the clamp look pretty well glued, at least when new. Both clamps are easy to press and hold well. The screw plates at the ball joint ends also have a corrugated rubber pad on a knurled plate. This is gentle on the screwing surface and creates friction that lasts well.

I find the set price reasonable in view of the quality and workmanship offered.