There is a catch!, This little guy needs a bit of weight, the runners insize are ball bearings on plastic rollers so there is a little bit of friction to overcome. End result as long as the item is reasonably heavy its great, but its not a "smooth" spin as you would expect on a normal greased metal running alternative.
For the price point the limitations are worth putting up with. If your looking for something for the kitchen a woodern metal running is a great lookinging alternative that
will free spin with light weight items.
If i get a moment i'll take some pictures of my setup and a video of the spinning motion.