The Graske used a Graske teleportation device to teleport themselves or their victims through time and space. They could also use it to teleport themselves and others to Limbo, another dimension. (TV: SJAF 1)
Krislok used a Graske teleportation device to teleport himself and Maria Jackson to Limbo. (TV: Whatever Happened to Sarah Jane?)
He also used the Graske teleportation device to teleport Rani Chandra from 2009 back to 1951, after Rani and Clyde had promised to give him the Verron puzzle box. (TV: The Temptation of Sarah Jane Smith)