Tribophysical waveform macro-kinetic extrapolator

The Tribophysical waveform macro-kinetic extrapolator was a long, flat device which utilised massive amounts of energy and then wrapped the user in a protective bubble.

Blon Slitheen intended to do this to escape early 21st century Cardiff, by blowing up Earth and riding away on the subsequent shockwave of energy. (DW: Boom Town)

It was subsequently utilised by the Doctor and Jack Harkness to create a force field around the TARDIS to protect it from the Daleks' missiles.

Following that use, it was used to protect the upper floors of the Game Station from the Daleks' transmats. (DW: The Parting of the Ways)

When the Doctor used it to move the TARDIS 200 feet away from the Empress of the Racnoss it appeared to have been integrated into the TARDIS systems, being wrapped around with TARDIS coral. (DW: The Runaway Bride)