Pneumatic Fan Clutch Wrench Set to Remove & Install. Quickly removes and installs fan clutch when repairing the water pump or fan clutch. Faster and easier than conventional fan clutch wrenches. No holding wrench is necessary. Use with an air hammer. Set includes. Blow Molded Storage Case. Handle Assembly (43370). 32mm Driving Wrench (43380). 36mm Driving Wrench (43390). 1-7/8″ Driving Wrench (43410). 2″ Driving Wrench (43420). 7/8 Driving Wrench (43430). 40mm Driving Wrench (43440). 47mm Driving Wrench (43530). Add to Favorite Sellers. Lisle LIS 43300 Pneumatic Fan Clutch Wrench Set.