MARTINS INDUSTRIES' 3-Ton floor jack design allows to roll it under as little as 3 5/16" of clearance. The protective sleeve along the lifting arm, the rubber handle and the rubber-padded saddle will prevent damaging the vehicle when pumping. When your work is done, twist the handle counterclockwise for a smooth lowering of the vehicle.* Get an extra 3" of lifting height. Compatible with our floor jack extension (MFJ-E).SAFETY WARNING: Never get under a vehicle that is not supported by a certified and proper jack stands. Validate lifting capacity before use. Correct and proper use of floor jacks and jacks stands can prevent injury and/or death.