A floor jack is a tool used to lift heavy objects, typically vehicles like cars and trucks, off the ground. It operates using a hydraulic system, which means it uses fluid pressure to lift the weight. This makes it easier and safer to perform tasks like changing a tire or doing maintenance underneath the vehicle. Using a floor jack is straightforward. You simply slide it under the vehicle, pump the handle to raise it, and secure it with jack stands for safety. It's an essential tool for anyone who works on their own vehicle or needs to lift heavy items, making repairs and maintenance much more manageable.