The MX-15? gives every golfer the chance to experience the benefits of Dual T-Zoid® Power Bar? technology. The MX-15? is a stainless steel game improvement iron with intricate perimeter weighting creating a low, deep center of gravity for exceptional forgiveness and ideal trajectory. The Dual T-Zoid® Power Bar? moves the center of gravity away from the face on longer irons (3-7) to help elevate the ball, while the solid T-Zoid® Power Bar? on the shorter irons (8-PW) provides more feel and workability for pinpoint accuracy with the scoring irons.