Duronic Monitor Arm Stand DM453VX1 | Quad PC Desk Mount | Steel | Height Adjustable | for Four 15-27 inch LED LCD Screens | VESA 75/100 | 13lbs Per Screen | Tilt -90°/+85° Swivel 180° Rotate 360°

Very sturdy! Holds four 27 inch monitor very well!

I had high hopes for this mount, but it ended up falling a bit short. At first glance, the packaging seemed fine. When I started assembling it, I noticed a few of the tiny hex screws that are used to lock pieces in place were missing. After some hunting, I found them rolling around in the box, underneath the cardboard insert.The center bar has a bit of a forward tilt, which made lining up the middle two monitors difficult. I tried to fix this by shimming the clamps a bit, but that took away a lot of stability. There's a ton of adjustability, but not where I really needed it. The side arms have a point to adjust their vertical hold strength, but when I tried to place my side monitors in portrait orientation, one of them just spun around. After some searching, I was unable to find any way to adjust this.The provided hardware worked fine for 2 of my four monitors. When removing the hardware from one of the monitors (the one that spun freely), the screws wouldn't back out at all. I'm unsure if this is the mount or the monitors fault, but I've used that monitor on other mounts without issue. Ended up spending a few hours removing the back of the monitor to remove the mounting hardware.At the end of the day, i'm still using the center bar to hold two monitors, but my side monitors are now held securely by North Bayou Monitor Desk Mount Stand Full Motion Swivel Monitor Arm Gas Spring for 17''-27'' Computer Monitor from 4.4 to 14.3lbs.