Woodoworkery:
So in other words, it's a hurry up and shoot thing.
Why would you want to lose any forgiveness, makes no sense why they would even incorporate that .
Confused
it's simply a function that illustrate that the high end clubs, Bladez & R11's, have got a smaller sweet spot on the club face .. the closer those lines are towards the ding line, the less margin for error u've got on missing the ding .. with the high end clubs u'll sacrifice some forgiveness for increased accuracy, spin, distance & faster meter ..
so if u wanna have a good result with the top irons u need to ding your shot or be very close to dinging it .. with the lesser irons you can be off ding to a larger extent without being penalized too much for missing the ding .. the penalty for missing the ding by too much with the top irons is a deviation away from your target area and a loss in power .. less so with the lower lvl irons