Our coupler is a manual hook style. When you use a hook style coupler, you don't lose tip radius. We use high strength alloy plate in our hooks and in our coupler. The coupler seats in the bosses first and then into the rear seat. This gives a tight fit that does not allow any movement. We use a horizontal wedge system that is held into place by two bolts. Our coupler comes complete with pins and one set of hooks.