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Big Bertha OS Irons incorporate a revolutionary clubhead construction, called the Exo-Cage™, that promotes more distance in an entirely new way. How? The Exo-Cage’s extraordinary combination of strength and light weight allows Callaway 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.
Lighter in overall weight, with more loft to promote faster ball speed and higher launch angle to make it easy to get the ball in the air.