Vehicle maintenance and emergencies require a car jack, a tool used to lift cars off the ground to perform tasks such as changing tires, changing oil, and repairs. It can be classified into several types such as hydraulic jacks which lift using fluid pressure, mechanical jacks like scissor jacks and screw type jacks which need manual force, and electric jacks which are motorized. Each type has unique benefits regarding lifting capacity, ease of use, and portability. A stable base and safety mechanisms like locks help prevent accidents during operation, maintaining effectiveness and security while using the tool.