Existing Jacks
You can see that these jacks are rusted.
New SmartJack Adjustable Steel Posts To Replace The Existing Posts
The SmartJack Adjustable Post is a better option for keeping floors stabilized. It is possible that the soils beneath the SmartJacks can move, causing the floors to become uneven again, but because the Smartjacks are adjustable, they can be raised to counteract the movement of the soil.