The E521 Iron-Wood offers the game-changing Houdini Sole in conjunction with a super-shallow face, slice-fighting offset designs, and heel weighting for added draw bias. These amped-up irons put a major emphasis on ease of launch, playability and correcting miss-hits and slices to go straighter for the ultimate in ease of use. Houdini Sole Technology – The Houdini Sole is an emerging sole design innovation that pushes weight back as much as possible for an ultra-low and deep Center of Gravity, optimizing launch conditions and greatly improving forgiveness off the face. The raised steel mass area of the Houdini Sole at the rear of the clubhead reduces the amount of sole area to reduce drag and turf interaction. The Houdini Sole design element has proven to be one of the most effective technologies at getting balls out of tough lies by reducing turf interaction by 35%.