LabZhang 4" x4", Stainless Steel Lab Jack Scissor Stand Platform,Lab Lift Stand Table, Scientific Scissor Lifting Jack Platform,Expandable Lift Height Range 50mm-145mm,Maximum Support Weight 10kg

It works as advertised. I needed it to adjust the vertical position of a speaker/tweeter in a special sonic resonance method test. It worked very well and is reasonably priced.

Great lab jack for my heating mantle, and it has plenty of travel distance.

I got this to use to raise the cooler in my wine cellar to the exact height for installation. It's a bit heavy and too clumsy to install by hand, so this was just what I needed. The jack was a little flexible under load, but not such that I felt it would collapse. I did notice that the screw threads were not lubricated so I put a bit of white lithium grease on the threads which made them work much better.As a retired lab chemist, a jack like this is used to raise baths or heating mantles for lab procedures. It would work fine for these as those procedures require much less weight to be raised.

Item works as described.

This product arrived completely unusable. The thing was riddled with flaws, regarding function and visual appeal. It was covered in scratches and minor dents. The metal connectors appeared rusted and were covered in blotchy yellow stains. Now during the brief moments while I still thought the product was usable, I immediately noticed its instability. The actual stage could be pushed about an inch in all directions and was easily tilted by more than +/- 15° bilaterally. These are all problems, but what really put the cherry on the dumpster fire was the fact that it had arrived with the support screw so stripped that IT COLLAPSED UNDER ITS OWN WEIGHT. This should constitute as less than one star for sturdiness. Needless to say this is now in transit back to China where it belongs. Sadly, I paid for accelerated shipping just to receive this item... and that money is truly gone. I'm a hobby chemist without a lot of funds, so naturally, the fact that I paid time and money for this horrific pile of scrap metal to be shipped from China, across the sea, over air to my capitol city, delivered to by doorstep AND BACK TO CHINA was infuriating. Also, imagine if I had trusted this product and actually used it... what if it had collapsed? Superheated oil very well could have been spilled everywhere and I likely would have sustained serious burns. I'm glad I didn't trust it.In summary: DO NOT BUY. I admit I am disproportionately angry when I should be moderately disgruntled, but this piece of garbage does not deserve your time.