The ultimate Mizuno muscle back - heavily influenced by the blades of Mizuno's past. The most noticeable change in the MP-20 is the re-introduction of copper underlay between the Grain Flow Forged heads and chrome plating. Last seen in Mizuno�s much-revered MP-29, MP-14, and the legendary TN87 � copper underlay was originally used to adhere the chrome plating to forged steel. Re-introduced in Japan�s domestic Mizuno Professional line in 2017, testing suggested that the legendary feel of the older blades was most likely due to that layer of copper. If you would like to customize the shafts, grips, lengths or lies give us a call or send an email to Tom@dallasgolf.com. Standard Mizuno warranty applies and satisfaction is guaranteed.