The New Callaway Steelhead XR irons deliver Explosive Performance In Our Most Popular Shape Ever. Relentless innovation created the new Steelhead. Its muscle comes from our next-generation 360 Face Cup, which increases ball speed and forgiveness. We built the longer irons to launch higher for more carry and distance, and the scoring irons to launch lower for more control and accuracy. The new Steelhead XR is packed with distance and built to score.