Quickly Removes & Installs Fan Clutch When Repairing The Water Pump Or Fan Clutch. Does the job much faster and easier than conventional fan clutch wrenches. No holding wrench is necessary. The set includes 7 driving wrenches that fit Ford, GM and Chrysler. Set now includes 7/8", 32mm,36mm,40mm thin and new 47mm size to fit Ford 6.0L and 6.4L Powerstroke Diesel pickups. 1 7/8" and 2" are still included in this set. 1 1/2", 41mm and 42mm are still available individually. Use with air hammer.