Yonex XP Ladies Graphite Golf IronsPOWER BREAKTHROUGHRevolutionary Dual Tungsten Power [DTP] System delivers ultimate power output.The EZONE XP range features the YONEX Dual Tungsten Power [DTP] System – an innovative engineering breakthrough that produces maximum power and distance. The newly designed DTP System, featuring Tungsten in both the grip and club head, works in conjunction with the Lightweight Shaft.The result is a swing that delivers an explosive power breakthrough with the same effort, adding more yards to your game. The Lightweight and counterbalanced shaft works in conjunction with the Dual Tungsten Power [DTP] System and has been engineered to generate higher swing speeds for added power off the tee. The composite 20g Tungsten Powder at the grip end works in conjunction with the Tungsten screw in the club head to produce an explosive power breakthrough. The Dual Tungsten Power [DTP] System and Lightweight Shaft counterbalances to retain a D2 swing balance, making it just as easy to hit as a conventional driver but with more power.