The Mizuno MX-20 irons are forged with a milled groove cut in the cavity of the long irons for a lower center of gravity and a higher ball flight. This makes the MX-20 irons easier to hit than theprevious Comp EZ model. There is a solid bar replacing the groove in the short irons of the MX-20 irons which raises the center of gravity for a more boring, controlled trajectory.