Each of the Callaway Epic irons are uniquely constructed to promote optimum performance and distance with the use of improvements on the technologies that has made Callaway the #1 iron in golf. The irons feature next generation 360 Face Cup Technology and is 1mm at its thinnest point to add even more ball speed on center hits and further minimizing distances loss on off-center hits. To enhance launch and trajectory, an incredibly high amount of MIM’ed (Metal-Injected Molding) tungsten was introduced into Callaway''s Internal Standing Wave technology to optimize CG location. The CG is lowered in the long irons for easy launch and high, long carry, and raised in the short irons for lower, more controllable flight. The Epic irons also feature Exo-Cage head construction that stiffens the body to allow the face to take on more of the load at impact to promote faster ball speed for longer distance.