A racket made in accordance with the invention is lighter than the Wilson Hammer rackets yet has a higher center of percussion , is stiffer .
A racket made in accordance with the invention has a higher frequency of vibration than a Hammer racket having a comparable cross-sectional dimension .
A racket made in accordance with the invention is lighter than the Wilson Hammer rackets yet has a higher center of percussion , is stiffer , and has a higher frequency of vibration than a Hammer racket having a comparable cross-sectional dimension .