Dunlop's FX 700 comes built with four key technology pieces that ensure exceptional power and feel starting with "Power Boost Frame Geometry." Dunlop's FX 700 comes with an aerodynamic shape of the frame with a modern, new precision groove engineered into the racquet frame under the grommet strip. Enlarge the sweet spot thanks to a new grommet structure that increases string movement. Hit with more power and more comfort