Mizuno MP-30 Irons Engineered with computer aided design to determine the ideal center of gravity for a boring trajectory. Grain Flow ForgedTM 1025 select mild carbon steel provides superior feel. Progressive half-cavity design maintains solid feel while offering more playability in the long irons and more workability in the short irons. Mizuno MP30 Irons Rolled leading edge, cambered midsole, and beveled trailing edge delivers consistent striking from all types of lies. Modified U-Grooves produce the ideal spin rate, for maximum playability in all conditions. Durable double nickel chrome plated with mirror finish. True TemperŽ Dynamic GoldŽ S300 steel shafts are standard. Other options are available in custom.