A tractor beam is a shaft of energy that is used to draw in far away objects. They are usually a feature on starships.
The Nemesis had a tractor beam which it used to seize hold of the Requiem Blaster.
When the Nemesis caught up with the Ark over Aquatron, the Decepticons attempted to use their ship's tractor beam to cripple the Ark but they became distracted by Superion going on a rampage from the upper decks to lower hangars. The Quintessons below used a much more powerful tractor beam to immobilize both warships.
Prime Force One had a tractor beam which Optimus used to make a dramatic entrance into the Vintage Salvage Depot for the Discriminating Nostalgist.