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.
The Z 585 is slightly more forgiving and features a high-strength steel face insert in the forged clubhead for higher COR and ballspeed at impact. A new internal “speed groove” behind the clubface further enhances face flex across a larger area of the hitting zone for extra forgiveness on off-center hits.
None of the above matters if you can’t aim your putter correctly Experiment with offset and straight-in hosels — you’ll definitely aim one type better than the other. Then check the alignment marks. Do you prefer lines that run parallel to the target? How many lines? These are important questions that can best be answered through a proper fitting.