This extra degree of strength allows for a thinner more flexible clubface and enhanced ball speed at impact. The thinner clubface along with a new hidden micro-slot in the sole not only increases COR but also expands the effective hitting area across a larger area. The micro-slot also allows for more weight to be redistributed for a lower and deeper CG location yielding improved launch on mid and long iron shots.
One of the somewhat surprising successes for Srixon in recent years was the Z U65 utility iron which very nicely blended the distance and versatility of a hybrid with the added control of an iron.
Available in both white and yellow the new and improved Q-Star Tour ($30/dozen) golf balls are aimed at players with moderate clubhead speeds that desire Tour-like performance with a soft feel and lower price.