With a clean, sleek look at address no other game improvement iron has ever approached, Big Bertha Fusion Irons deliver the unmatched playability, performance and confidence that could only come from Callaway Golf(R), the established leader in forgiving iron technology. Three components -- a proprietary Tunite(TM) alloy cradle, a lightweight titanium face insert, and a TPU SenSert(TM) -- make the Big Bertha Fusion Irons the most technologically advanced irons available today.

At the heart of Fusion Technology in the new Big Bertha Fusion Irons design is the Tunite alloy cradle. Callaway Golf designers created a new, patented alloy for the cradle that is ultra-dense and allows 77% of the clubhead mass to be repositioned to the perimeter of the head. This extreme perimeter weighting creates very high Moments of Inertia (MOI),