ZipCore. ZipCore Technology in the 8i–SW sets the Center of Gravity right where you strike the ball, giving you more consistent performance and enhanced forgiveness. And, by adding an abundance of high/low and heel/toe MOI, you’ll enjoy increased feel and control.

HydraZip. Our proprietary dynamic blast and laser-milled line system creates roughness to enhance friction, optimizing spin for distance with long Irons and control with short Irons.
 

MainFrame. MainFrame in the 4i–7i is a system of channels and cavities carefully milled into the backside of ZipCore XL Iron faces to maximize flex at impact. Boosting COR while also repositioning mass for a lower CG, MainFrame creates faster ball speed plus more consistency and forgiveness.
 

XL Head Design. A bigger head allows us to position more mass away from the center of the club for more MOI. That MOI boosts forgiveness to levels that help all your shots launch high and fly straight