SLIM SHAFT - More speed = More power. Designed to slice through the air, generating speedy power. ISOMETRIC - Enlarged Sweet Spot. Compared to a conventional round frame, a square-shaped ISOMETRIC racquet generates a larger sweet spot by optimizing the intersectionof the main and cross strings. ISOMETRIC delivers greater control without sacrificing power. AERO+BOX FRAME - Combines solid hitting feel and quick swing. Control Support CAP - Sharp Maneuverability. The control support cap provides an 88% wider flat surface compared with an ordinary racquet for easier gripping, fast follow-through and the sharpest maneuverability. ROTATIONAL GENERATOR SYSTEM - For Maximum Control. By applying the counterbalance theory, weight is distributed throughout the grip end, frame top and the joint for maximum control. The transition to the next shot can be performed smoothly with a rapid succession.