Using the Jet JT9 - 441315 SJ - 15T Screw Jack is quite straightforward. First, make sure the base is placed on a flat and stable surface. Then, position the corrugated pivoting head under the load you want to lift. If you need to use the turning bar (which you'll have to buy separately), insert it into the bar hole. Start turning the bar slowly to lift the load. When you're done, reverse the turning motion to lower the load gently. Here are some important things to keep in mind. Don't exceed the 15 - ton capacity of this jack, as it can be dangerous. Always check the base and the head for any signs of damage before use. For maintenance, it's a good idea to clean the jack regularly to prevent dirt and debris from getting into the moving parts. You can also apply a light coat of lubricant to the screw to keep it working smoothly. By following these simple steps, you can make the most of your Jet screw jack and ensure its long - lasting performance.