Jacks are usually rated for a maximum lifting capacity (for example, 1.5 tons or 3 tons). Industrial jacks can be rated for many tons of load. The jack shown at the right is made for a modern vehicle and the notch fits into a hard point on a uni body. 1.1.1 HYDRAULIC JACK It is a short stroke hydraulic lift which is fed from hand pump. The hydraulic jack may be portable.