... , 54, 57, 68, 72, 76, 83mm Wrench Sizes Fan Clutch Wrench SetRemoving fan clutch to replace water pumps or for otherengine service ... job done. Heat-treated to withstandhigh torque to remove some fan clutches. Most wrenchesfeature a 1/2 drive square for attaching ... extra torque.Set includes: 2-1/4" Fan Pulley Holding Tool 2-3/8" Fan Clutch Bolt Holding Tool 2-1/8 ...