Powerbuilt 10 Piece Master Fan Clutch Wrench Set Remove threaded-on viscous fan clutches on Ford, Chrysler, GM and imported vehicles with these strong heat-tempered steel fan clutch wrenches. The larger wrench keeps the water pump shaft from spinning while you loosen the fan clutch nut with the appropriate smaller wrench. Stylish black finish. Strong and dependable enough to last a lifetime. Kit Services: Ford, Chrysler, GM and some imported vehicles. Any specialty tool will help make an automotive repair or maintenance task easier, but Powerbuilt automotive installer tools take the concept of ‘help’ a big step further. It starts with the storage case – heavy duty design ensures it will stand up to years of use and abuse. Inside the case lid you’ll find how to instructions and photos that show step-by-step usage instructions. The finishing touch? All Powerbuilt installer kits meet or exceed ANSI and/or ASME standards. Set includes 1-7/8" (47mm) left-hand clutch nut wrench1-7/16" (36mm) and 1-9/16" (39mm) fan clutch wrenches2-1/4" (57mm), 2-11/16" (68mm) and 3-1/4" (82mm) fan pulley holding tools2-3/8" (60mm) fan clutch bolt holding tool2-13/16" (71mm) fan hub wrench2-1/8" (54mm) and 3" (76mm) fan clutch pulley holding tools