To demonstrate dramatically Pascal's Law and the large forces attainable using hydraulic systems.
Hydraulic press with length of wooden 2x4.
Pump handle slowly so that indicator reads correctly. Do not exceed 5 tons.
Place the provided 2x4 board between the jaws of the press as shown in the photograph. Tighten the pressure release valve and pump the handle to increase the force and crush the 2x4. Pressure is read directly in tons.
Hein-Werner Hydraulic Jack, Manufacturer's Instructions.