The 12-Ton Telescopic Bottle Jack by OTC features a new, rugged design that provides you with added functionality. This high-performance jack consists of a base, pressure cylinder and oil reservoir that form 1 internal part for strength. It is also telescopic, which imparts a very low initial weight with high lifting. In addition, the piston never contacts the cylinder, so pressure is absorbed and doesn't damage the jack if the vehicle tilts.