The D is D300 not only stands for distance, it defines it. The next generation of FLX Face Technology allow for 76% of the face to be completely free from the body, delivering maximum bend and a powerful launch. With visible technology around the entire face, the Power Holes filled with TE031 Urethane allow the face to flex upon impact for improved feel, with a crisp, pure, recognizable sound for distance and accuracy. KBS Tour 80 steel shaft. Wilson Staff Tour Traction grip.