Pneumatic jacks are tools that use compressed air to lift heavy objects. They are commonly used in automotive repair and construction, allowing workers to easily raise vehicles or equipment for maintenance. The design typically includes a cylinder, piston, and air compressor, which work together to create lifting power. These jacks are favored for their speed and efficiency compared to manual jacks. They can lift loads quickly and require less physical effort from the user. Safety features, such as pressure relief valves, help prevent overloading, making pneumatic jacks a reliable choice for various lifting tasks in industries like automotive and construction.