This is a great shaft!  The flight is controlled through the set by utilizing stepping patterns that are progressively adjusted in length to alter the tip stiffness as you move from the long irons (softer tip for higher launch) to the short irons (stiffer tip for flatter trajectory).  The long irons are the least tip stiff of the DG Pros. This is to encourage a higher trajectory, since most golfers struggle to launch these clubs as high as they do the shorter and higher lofted clubs. Additionally, the higher launch should lead to more overall carry and less rollout than standard setups.  The intention of this section of the DG Pros is to provide a higher trajectory and they really do accomplish this thanks to the progressive tip stiffness.   The most impressive part to the higher trajectory is being able to hold greens with a 3-5 iron ... what a lot of amateurs strive for.  The short irons of the DG Pros are the most tip stiff of the iron shafts thanks to the larger steps they possess leading into the even shorter tip sections. The stiffer tips are intended to provide a slightly flatter trajectory than typically seen in the scoring irons to prevent ballooning. You can truly feel the shaft unload and kick through the zone.

I am thinking of putting them in my AP2 714's.