Wilson Pro Staff 95S Spin Effect Tennis Racquet (Unstrung) Wilson Spin Effect Technology reduces the number of cross strings to produce more spin without having to change your swing Racquet comes unstrung and a racquet cover is not included The extra spin provided by Spin Effect Technology gives the player 2 additional inches of net clearance and allows the ball to drop quicker, making the court seem 12 inches longer The Box Beam Frame provides the player with massive amounts of control and accuracy Amplifeel Technology reduces harsh vibrations in the handle and adds power