The screw jack has an important characteristic, which is the tightness of the structure. It is precisely because of this characteristic that the screw jack can maintain stable performance in a series of lifting operations.

The structure of a screw jack is very different from that of a hydraulic jack. It completes lifting through the interaction between internal machinery, while a hydraulic jack relies on the flow of internal hydraulic oil. The two have essential differences in properties. The tightness and stability of solid components are much higher than those of liquids, which also brings two extremely important characteristics to screw jacks. One can be used as a support, and the other can be used horizontally.

The test of supporting use is the pressure holding capacity of the screw jack. The pressure holding capacity of solid components is much higher than that of liquids, so the screw jack can be used as a support point for bridges and buildings for a long time. Horizontal use is because its internal components are not affected by gravity and do not change their direction of movement like liquids. No matter what position the screw jack is placed in, it will not affect the operation of its internal machinery, so there is no problem with the horizontal use of the screw jack.