Head MX Attitude Elite Tennis Racket (Lime) (Strung)The ATTITUDE ELITE comes with a bigger sweet spot for a better chance to make the perfect shot. This racquet will make sure that your first steps on the tennis court won't be your last. Pre strung, the ATTITUDE ELITE has a bigger head size for a bigger sweet spot. Technologies METALLIX Specially formulated crystalline metal alloy with a grain size 1000 times smaller than that of a typical metal creates a much stronger material. The Hall Petch Effect