Flywheel Puller with crank shaft protector for Mercury, Mariner, Force and some Yamahas outboard motors with 1 1/2"-16 threads. ***This model has heavy duty, 5/8 - 18 precision Grade 8 fine threads on the pusher bolt. *** Don't Settle For Imported, Low Grade Items Sold by Others. This Puller set comes with a black oxide finish preventing corrosion to assure many years of service. Note: Will not work on Verado. Proudly manufactured and assembled in the United States.