The Double HH PTO Adapter allows you to increase, reduce, or extend a tractor’s PTO shaft to fit an implement. Available in yellow zinc plating or black oxide finish, it provides durability and corrosion resistance. When used with an over-running coupler, it drives implements like mowers, balers, and hay conditioners smoothly while free-wheeling when the implement exceeds PTO speed. Use caution, as PTO adapters may extend shaft length and require additional guarding for safety.