Durable and sturdy aluminum lifting unit and frame for a high-quality appearance and lighter than general steel trolley jack. Features a 3 ton (6,000 lb) capacity and a low profile chassis with a mininum lifting height of 3.74" while the max height can reach to be 18.9". It is equipped with a dual piston pump fast-lift system to reduce the time of lifting from bottom to top and features a built-in overload system which prevents loads beyond rated capacity as well as a slow release rate under load.