Fan Clutch Sprocket Camshaft Pulley Holding Wrench Tool is designed to remove and install fan clutch and rotate or restrain the camshaft pulley. (0.24-0.39″, 0.31-0.43″, 0.39-0.47″, 0.43-0.62″). Fits many different fan clutches and camshaft/crankshaft pulleys with grooves or holes on variety vehicles.