The QuickJack hydraulic cylinder completely eliminates the need for clumsy screw mechanisms, and we have the cylinders available for the 3500/5000 series and 7000/6000 series car lift models. Constructed from the same rugged 14-gauge welded steel as the rest of the frame, the hydraulic cylinder is securely machine-welded to the air cylinder. Both features assist with the raising and lowering of the frame.