Tractor beam

The Doctor's TARDIS holds a neutron star in place with a gravity tractor beam. (TV: The Creature from the Pit)

A tractor beam was a beam of energy projected from a vessel or device which could tether and pull another object. The Doctor's TARDIS could create a tractor beam with the help of the Master's laser screwdriver. (GAME: TARDIS) The Fourth Doctor used his TARDIS' gravity tractor beam to hold a neutron star still while Erato used his ship to weave a protective shell around it. In the process, the tractor beam burned out. (TV: The Creature from the Pit)

It had been repaired by the Doctor's tenth incarnation when he used it to save the Sanctuary Base 6 rocket from a black hole. (TV: The Satan Pit)

During the end of the Doctor's encounter with a pan-dimensional being, his TARDIS got caught in a tractor beam heading towards Lakertya caused by the Rani. (PROSE: Spiral Scratch/TV: Time and the Rani)

The Doctor's TARDIS also had an anti-gravity spiral that had similar properties to a tractor beam. (TV: Delta and the Bannermen)

Chula warships, such as the one stolen by Jack Harkness, possessed a tractor beam. (TV: The Empty Child/The Doctor Dances)

K9 Mark 2 possessed a tractor beam which could pull an object as large as an adolescent humanoid, (TV: Fear Itself) he could also use it to absorb microscopic objects. (TV: Black Hunger)

The Time Lord Azmael intended to employ a tractor beam to move two minor planets in the same orbit of the planet Jaconda, previously under his protection. The Sixth Doctor made him change his mind, by pointing out the consequences. (TV: The Twin Dilemma)