We've done it once again with the new Big Bertha Irons, led by our groundbreaking Suspended Energy Core. The Suspended Energy Core is a construction that's never been achieved before in a golf club, featuring a revolutionary core design that delivers: 1) incredible sound and feel; 2) long, consistent distance; and 3) easy launch. With all of this advanced technology, a stunning look, and new premium Recoil and KBS shafts, you have a transcendent iron that's earned the right to be called Big Bertha.