If you exclude the cheap screws and bolts it comes with as a base, it does what it promises. It has lifted up to 16 kilograms so far.

Attractive, but one of its plastic parts broke under the weight of a child's bike (11-year-old). The problem they have is that they attach to the central axle of the bike, causing uneven weight distribution if there is a slope, usually burdening the rear. It requires careful study of the distance between them and their final altitude difference in order to distribute the weight evenly on both sides, something I had not done. Therefore, if you install it, I would not advise using it for another bike because its weight may be distributed differently and cause damage to one of the two bases.