My Mercury outboard uses round connectors and I wanted 'this? kit" for assembling the wiring harness. Well, like other reviews, the metal part is too flimsy and flimsy for crimping of any quality. Worst of all, females are 12-10 sizes, they can't be crimped at all. Both ends are junk , the crimp end on mine is slotted, on the other end I can't get the ball end into the socket Wrong size, you can force it and you can get it before the plug bends, but you still can't crimp the end of the wire…