FAIRWAY ONOFF ARMS LP-421F PURPLEEXCLUSIVELADY DESIGNNEW POWER TRENCH A new POWER TRENCH sole design equals easy distance where even off center hits are still powerful. A larger, more forgiving sweet spot on the face creates more powerful spring effect for more ball speeds resulting in more distance. Point Compared to the previous model, the new POWER TRENCH is a single wider and deeper groove. With the POWER TRENCH along the leading edge, it works with the face to improve spring