This holder is advertised as a laptop/Dj stand. So I bought it to hold a small 8 channel mixer on my side.
It was absolutly perfect for my use, and the mixer (SoundCraft EFX8) fits into it like a glove and is securely held by the two clamps in the front.
The only problem is the "braking" mechanism. The whole system "locks" and is held in horizontal position by fastening a screw, which in return, closes down (or presses down) a small plate (really tiny comparing to the size and weight of the whole system). The small plate has four "teeth" which when pressed down, locks the system in place and it seems to be made out of a softer cast metal and even not steel.
For some moderate lightweight items such as a small laptop, it perhaps could be sufficient, but even the smallest mixer is at least a few times heavier than a regular laptop (in my case the EFX8 weighs around 4,5kg), and added to the weight of the system itself (it's not light), you can imagine the amount of strain those long arms put on those tiny little teeth which are supposed to hold the entire system horizontally. Even after just a few tests at home, it started to show some signs of wear and tear on the locking "teeth", so it wasn't difficult to imagine that it won't last forever and one day eventually those teeth will wear off and it won't be possible to lock it in place. And if those teeth wear of, which they eventually will, then the entire system collapses down with whatever gear you may have on it. I wouldn't want to see this happened during the concert.
So I tried to communicate with the company to find out whether it's possible to buy a number of spare "brake plates", so to be able to change the brakes whenever it starts showing the sings of wear and tear. Unfortunately they only redirected me to another website, saying they don't provide information. I tried the other websites and never received a response.
I finally decided to return the product and bought another holder from K&M, which despite being the third of the price of this, it is many times sturdier.
Thomann as always did a phenomenal job with their great customer service and fast shipping.