The Mizuno MP-4 Irons feature the following Muscleback design with bulging muscle ensures thickness behind impact for solid feel. Thin top line & reduced offset helps manipulate ball flight. Variable Muscle Bulge feature more bulge in the short irons for trajectory control. 8-PW are more compact than previous MP irons. Grain Flow Forged from a single piece of 1025E Pure Select mild carbon steel for enhanced feel.
Brand spankin' new!...factory original.