Unique advanced technology for higher kick velocity BOOSTBOX: the combination of BOOSTRING technology that consolidates the area near the face into a fixed ring-shaped structure and SPEEDBOX structure that increases the rigidity around the face perimeter. That inhibits excessive vibration during impact, which transfers impact energy into kick velocity to a maximal degree.

Golfers subconsciously tend to try and hit the ball at the point they think is the vertical center of the club.Therefore, considering that tendency, Yamaha designed the crown and face shape so that the area that is subconsciously recognized as the center matches the location that results in the longest flight, which is slightly above the face center. In addition to increasing the overall head height by making the crown slightly more bulbous, adjustments were also made to the crown-face boundary design and to how the score lines appear. The head was designed so impact points are centered in the upper portion of the club face. Now, a normal swing produces a higher club head revolution velocity at the face center, which increases kick velocity.

Unique COUNTERWEIGHT SYSTEM is introduced so that weight distribution of the toe and back around the center of gravity is optimized. It achieved a ladies-model highest-class transverse moment of inertia. This system produces more forgiving of mishits, and impressive fight distance and trajectory consistency.

Clubs having a large moment of inertia tend to have a large projection area, however, inpres DRIVESTAR for LADIES features a shape and length for lady golfers, making it easier to establish a comfortable stance and stress-free swing.