Jack Pegs are a type of peg that operates a mechanism from the game DK: King of Swing. They appear as simple levers with to pegs for Donkey Kong to hold onto. One peg is in the center of the jack peg and the other is on the end of the lever, which Donkey Kong must repeatedly pull down by rapidly pressing or , depending on what side of the jack peg the lever is located. Jack pegs are typically pulled down in order to open up walls and create a path from Donkey Kong to climb up. These paths are only temporary though, as the jack peg eventually returns to its starting point, closing the walls. Jack Pegs are also found on metal bars, similar to Handle Pegs, and, if pulled on, they travel along the bar. The Jack Peg first appears in Puzzling Pyramid, where a Kremling is pulling on one. They later appear in two more levels, Madcap Mine and Underwater Ruins.