Isomectric head frame - Equalizes the length of main and cross strings in the stringbed, enlarging the sweet-spot for more consistent accuracy even on off-center hits. Quad Vortex Frame - QVF Spiraling movement of air around whirlpool at 2, 4, 8 and 10 o'clock of frame to minimize air resistant results easier handling and faster swing. High Speed Frame - The High Speed Frame design is an aerodynamic hexagon shape frame designed to reduce drag on the frame during straight on swing or hit. Resulting in a fast swing-through and the quicker maneuverability. Reinforced Structure Frame - The new material is adopted in the frame in order to make the frame Ultra high Strength & Stiffness. As a result it can handle string tension of up to 38lbs. Taper Shaft - A unique shaft construction which tapers down from 7.3mm diameter at the top of the cap to 7.0mm at the T-Joint. This design raises the flex point of the shaft higher up towards the head, it gives the racquet greater power and a more precise shot.