K&M 24185 Universal Wall Holder BK

cons - The screw has not enough power to hold the speakers in its position as it should. It is tight but sometimes the speaker rotates on its own. I guess the KRK wall can hold much more than this one.
<a class="article link" href="https://www.thomann.de/be/krk_vxt_6_8_wall_mounting_adapter.htm">KRK VXT 6/8 Wall Mounting Adapter</a>

(Tried with Genelec M30, Focal CMS 40 which are not big speakers at all)

The build quality is good, but the way the pivoting bracket is hold in place using a ball joint is not strong enough to ensure the speaker (6.5 kg) is held in position over time: the speaker tend to sway down over time.