The Callaway X-12 irons take design elements from the Big Bertha line that increases launch angle and forgiveness. The variable 360° undercut channel creates maximum perimeter weighting and moves the Center of Gravity lower for better launch conditions. This also allows for a thinner profile that reduces drag for improved performance out of the rough, should you ever need it.
Callaway Big Bertha X-12 #3-PW 8 pc. Iron Set Stiff Flex Steel Shafts MRH