This is not really a 10 ton jack as claimed. It starts to struggle lifting around 5 tons, and at that weight, oil starts to slowly seep out of the top of the cylinder, the o-ring seal can not hold the pressure. For the price, it's a decent jack, but it's not really truthful to advertise it as a 10 ton jack. My positive rating is generous - if I really needed to jack up ten tons, I would be forced to return it, there is no way this jack will be able to do that for very long, maybe not even once.