The New MP-25 irons are created with Mizuno's innovative Grain Flow Forging Process with 1025 Boron. The MP-25 irons strike the perfect balance between giving the player added distance without sacrificing one ounce of feel and ball control. To help activate the 1025 Boron material, MizunoÕs team of designers created the Micro-slot which helps the face flex for added distance. Also, with standard lofts, the MP-25 iron maintains proper gaps between irons so that the player has ideal distance control. Please contact us if you would like to customize the lofts, lies, grips, or shafts. Satisfaction and authenticity are guaranteed. Standard Mizuno warranty applies.