I bought this 20 ton pneumatic hydraulic jack to replace the manual one on my Harbor Freight press at half of the price of the 20 ton pneumatic hydraulic jack from Harbor Freight, and it works fabulously. In fact, it worked so well that I bent my ram slide plate assembly when a wheel hub broke under the pressure that this jack put on it. If you need a heavy duty air hydraulic jack, you can't go wrong with this one!