These Big Bertha iron clubs feature a Suspended Energy Core, delivering incredible sound and feel, distance and consistency, and an easy launch. These hybrids are also the first to combine adjustability with Callaway’s innovative Jailbreak Technology that incorporates two internal bars that stiffen the body, placing more impact load on the face to promote fast ball speed and long-distance. Its ultra-thin face and Hyper Speed Face Cup delivers fast speed on both center and off-center hits.