The Titleist PT Metalwoods main feature is their 15" radius bulge on the club face. This bulge reduces the amount of side spin generated when the ball is struck off center as a result of the gear effect. The bulge effectively puts the opposite spin on the ball a normal club would have that brings the ball back to the target line. These clubs are made from 17-4 stainless steel and are traditionally shaped. Buy a Titleist PT driver or fairway wood from 2nd Swing and get a great deal by trading in your old clubs!