This 2-piece set removes and installs fan clutches. The set includs a universal holding wrench and a universal turning wrench. The holding wrench is adjustable to fit the bolts that attach the pulley to the water pump. The turning wrench has the 5 common fan clutch nut sizes built into one tool: 7/8" (22mm), 1 7/16" (36mm), 1 9/16" (39mm), 1 7/8" (47mm) and 2" (50mm). Both wrenches are long to provide extra leverage for stubborn fan clutch nuts.