Mercury Mariner Yamaha Force Flywheel Puller Removal Tool Kit for 1-1/2"-16 Hardware is black oxide coated for durability Fine threaded high strength bolt ensures smooth operation Fits most Mercury, Mariner, and Force motors 50HP and up. Also fits some Yamahas. Works on motors with 1 1/2-16 thread. This is a quality product 100% made in the USA