Small price - Appropriate product

For the price a strong buy recommendation. The entire holder is made of durable 3mm material.
Horizontal and vertical tilt are set easily and to tighten using the supplied Allen.
By extendable arms, you can attach different types of projector without much effort.

Because the beamer can later "hang" on the ceiling mount can installation of ceiling bracket and Beam Erhaler are very simple.

Although only for ceiling mounting are 6-head screws, but no Werkzwug.
I have worked with 4 M8 hanger bolts and self-locking nuts. (Abgehängete lightweight wooden ceiling and drywall)

Rotating the holder is only limited by the ceiling mounting plate (elongated holes) So when hanging forward to the approximate alignment and the drill to the center of attention.

Overall feedback: Very good product at absolutely fair price.