New Callaway Big Bertha OS Irons

Big Bertha OS irons incorporate a revolutionary clubhead construction called the Exo-Cage, that promotes more distance in an entirely new way. The Exo-Cage’s extraordinary combination of strength and light weight allows our engineers to distribute more discretionary weight into strategic locations to promote more forgiveness and to allow our next-generation 360 Face Cup technology to function more efficiently. The result is more ball speed across the face to give you more distance on every swing.