The Mizuno MP-58 irons features a dual muscle cavity back and the revolutionary Muscle Titanium technology which combines forged steel and titanium to combine during the Grain Flow Forging process to deliver amazing feel and playability. It allows for more perimeter weighting for more forgiveness without giving up feel or consistency. The durable double-nickel chrome plating provides a classic look.

• Dual Muscle TITANIUM design combines multiple materials during the Grain Flow Forging process to deliver solid feel and amazing playability
• Impact, sound, and feel are optimized through extensive utilization of Modal Analysis, which separates Mizuno irons from the competition.
• Patented Grain Flow Forged™ 1025E "Pure Select" mild carbon steel and pure Titanium combine to provide the ultimate soft, solid, consistent feel.
• Durable double nickel chrome plated finish and a Black Chrome stainless steel muscle medallion provide elegant aesthetics.
• Modified U-grooves, which conform to the Condition of competition 2010, produce the ideal spin rate for maximum playability in all conditions.
• Rolled leading edge, flattened mid-sole, and rolled trailing edge deliver consistent striking ability from all types of lies.
• Modified U-Grooves conform to all USGA groove rulings, as well as the "Condition of Competition" Ruling taking effect on January 1, 2010.