I bought the wall mount to my 27 "monitor for better appearance on the wall to fix to have and more desk space. As this support is not swivel (was with me not necessary), it has a very small distance from the wall of 1.5cm.
The holder is in place within 10 minutes, holding the monitor bomb stuck on the wall, the two security screws underneath are not absolutely necessary, since the monitor is plugged on top of the mount in a kind of "wedge".