This 32-mm, thin profile open end wrench is used to remove the themo-viscous fan clutch. This is required for fan clutch replacement, water pump service and many other front engine repair tasks. The total length is 15". Thickness is 5/16" (8-mm). Please note that many of these fan clutch units utilize left-hand threads. Please ensure that you are applying force in the correct direction. Typical installations require a matching holder for the water-pump side of the interface.