Callaway golf steelhead xr graphite irons the all new steelhead xr irons are the newest addition to the innovative callaway xr family they integrate the advanced playability and precision shaping featured in the successful steelhead x 14 care was taken to maintain the design integrity of the original steelhead iron preserving features such as a longer blade length signature hosel to face transition and a slightly more rounded toe next generation 360 face cup technology is the dri