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.
Men's Set Configuration: 3 hybrid,4 hybrid,5,6,7,8,9,PW
Senior Men's Set Configuration: 4 hybrid,5 hybrid,6,7,8,9,PW,AW
Men's Stock Graphite Shaft: UST Recoil ES 460 (Irons and Hybrids)
Women's Set Configuration: 4 hybrid,5 hybrid,6,7,8,9,PW,SW
Women's Stock Graphite Shaft: UST Recoil ES 460 (Irons), UST Recoil ES 450 (Hybrids)
Stock Grip: Callaway Universal