Dimension Cannon

The Dimension cannon or the Dimension jump is a device that can travel to different dimensions by ripping a hole in the universe and hopping through the Void, at the cost of breaking the walls of the universe.It was created in Pete's World by Torchwood.

First Version (Battle of Canary Wharf)
After the Cybus Cybermen left Pete's World to travel to our universe, Torchwood created a device that can hop to another universe. This first version resembled a yellow disc, this device would hang by someone's neck like a necklace and would teleport at the same position on the chosen world where they teleported from the other world. The use of the Dimension cannon opened the breach further and further and raised the temperature on Pete's World. After the Doctor sucked the Cybermen and the Daleks in the Void, the breach closed itself because of the amount of Void stuff.(DW: Doomsday)

Second Version (War in the Medusa Cascade)
In Pete's World, Rose, Mickey Smith and Jackie Tyler used a new Dimenson Cannon that once again broke the walls of the universe to enter our unverse.The walls of the universe eventually started closing themself, a process that the DoctorDonna called a dimensional retroclosure. This new version unlike the original, was handheld and could travel to different parts of the space, but needs to recharge for 30 minutes after each use. The Dimension cannon could also measure time lines.(DW: Journey's End)