Also called Repulsor Wheels, they are the means by which hover cars are generally possible.
Cylinder shaped objects, they use either Gravity Coils, Gravity Generators, or a combination of both, to fly. In their smaller forms the appear in groups, but may be a group of large units for larger objects. Their purpose is to generate controlled Anti Gravity.
Repulsor lifts are used in speeders/hover cars, fighter crafts and even elevators, in the form of a Turbo Lift.