These are the most commonly used versions. They are manufactured on the basis of a frame with Teflon or steel wheels on which the jack is installed for lifting. Its wheels have the particularity of rising when the jack is under load, leaving the frame resting on the ground. This device confers a real stability to the equipment when it is under load avoiding any possibility of tilting. It is important to underline that the wheels do not rise under the weight of a gearbox, which allows the operator, once the dismantling operation is completed, to take it out at the front or rear of the vehicle to be picked up by a forklift, an overhead crane or a workshop crane. The "basic" model manufactured on this chassis base does not allow the cylinder to translate "right/left" and to adjust itself under the vehicle. It is therefore advisable to use a right/left translation model when the pit is not wide enough for a lateral adjustment under the vehicle. The advantage of this model is that it can be used in the pit as well as in the workshop under mobile columns, barrel cranes or scissor cranes.