Mizuno MP Series Wedge. Mizuno's Grain Flow Forged MP Series wedges are made from 1025 Select Mild Carbon Steel and offer the most solid, soft, and consistent feel available. Computer-milled deep U-grooves provide optimum spin and control while lie responsive sole design reduces turf drag and performs in any lie. The MP Series line is designed for players of all abilities to accompany any and all Mizuno iron sets.