The Lisle Pneumatic Fan Clutch Wrench Set, No. 43300, assists in removing and installing the fan clutch when repairing the water pump or fan clutch. No holding wrench is necessary. The set, designed to be used with air hammer, includes seven driving wrenches that fit Ford, GM, Chrysler and Jeep vehicles, including 7/8", 32mm, 36mm, 40mm thin and 47mm size to fit Ford 6.0L and 6.4L Powerstroke diesel pickups. The 1-7/8"and 2" options are also included in the set. Additionally 1-1/2", 41mm and 42mm options are available individually. A blow molded storage case is included for storage.