A bottle jack is a type of hydraulic jack used to lift heavy loads, such as vehicles or machinery. It consists of a cylindrical body that resembles a bottle, hence the name. When the handle is pumped, hydraulic fluid is forced into a cylinder, raising the lifting arm and the load above it. Bottle jacks are compact and portable, making them ideal for use in tight spaces. These jacks typically have a lifting capacity ranging from 2 to 20 tons, depending on the model. They are commonly used in automotive repair, construction, and other industries where heavy lifting is required. Safety features, such as overload protection, are often included to prevent accidents during operation.