Carefully crafted badminton racket provides control, accuracy and precision for advanced level players. The DUORA Z-STRIKE gives you the power to be offensive on both forehands and backhands, anywhere on the court. Dual optimum system provides power to forehand and backhand. Nanometric DR is a unique graphite material developed for next generation space aviation. DUORA GROMMET features 8 liked grommets made with differing thicknesses on either side of the frame. On impact the stiffer AERO side grommets pull the string harder, increasing launch power for that crucial shot.