Mizuno MP R-Series Chrome Wedge. New for Mizuno's 2007 range, the MP-R Series wedges feature Mizuno's tour inspired Workshop-grind sole design to create the widest variety of shot making opportunities. Manufactured from Grain Flow Forged highest grade 1025E Pure Select mild carbon steel, with grooves precision milled for maximum definition, the R-Series delivers the purest touch and biting control unleashed by Mizuno.