Wilson X31 Men's Right Handed 8 Piece Steel Iron Golf Club Set Game Improvement irons feature a combination of very large sweet spot for improved accuracy Low center of gravity to get the ball flying easier and longer Deep undercut cavity design creates a hot face for better distance and improves ball flight on off center hits Lightweight True Temper steel shafts feature low torque for better control and excellent feedback from the club head 431 Stainless steel iron heads are precision cast to exact Wilson standards for game improvement performance