Lisle 43300 7pc Pneumatic Fan Clutch Wrench Set. This wrench set Quickly removes and installs fan clutch when repairing the water pump or fan clutch. Does the job much faster and easier than conventional fan clutch wrenches. This set has 7 driving wrenches that fit Ford, GM, and Chrysler. Wrench sizes are 36mm, 1.5", 1 9/16", 41mm, 42mm, 1 7/8" and 2". Drive the fan clutch nut in the opposite direction to replace. For use with an air hammer.