Steelhead pro irons are the newest addition to the xr family and they combine a beautiful compact shape with playability and control in a sleek black pvd finish the speed and distance of steelhead pro irons are based on our next generation 360 face cup technology which allows the edges of the ultra thin face to freely flex and release at impact with greater efficiency adding ball speed that promotes more distance especially on off center hits more speed and distance on mis hits is made