Lisle 59600 Deutsch Terminal Tool Tool works on OEM electrical connectors used on trucks and equipment such as Caterpillar, Kenworth, Peterbuilt, Freightliner, Mack and more Tool has three sizes of slotted tubes for working on different sizes of Deutsch terminals Slotted tubes are made out of stainless steel which works and lasts longer than plastic disconnect tools Also used on some Harley Davidson connectors