Great clamp stands.
Package is well organized, and you'll soon see it's heavy for a reason.
Stands themselves are very sturdy, clamping system works perfectly, and every stud you turn makes you feel sure and safe about it staying there.
27 kgs bearing capacity means a 8ye-old kid could easily sit there.
Plates are padded with a fin rubber foam (EVA), keeping your speakers from slipping, moving, and slightly absorbing vibrations at the same time. If you're planning on subs heavy speaks, you may always add a foam pad, but bear in mind you won't be able to incline trays.
You get the option to slant-plant your speakers (+-15°), get the clamps height to its max (353mm), which is more than enough to get a good listening position with your speakers behind eventual racks on your desk.
Been using these clamps with a pair of ADAM T7V, they're perfectly still, won't move unless pushed with fair strength, and no vibrations are felt through the desk where they're installed on.
They're not cheap, but every cent your paying will be rewarded with a great feeling of "Now I can rest reassured that they're safe".
Will definitely buy again, need be.