The Tecnifibre TFight 315 Dynacore gives tourlevel performance with classic feel This upgraded model features some all new technologies that are sure to make you love this racquet even more than the last Even the grommets are packed full of technology now offered with Bumper Armor Caps which increase the life of bumper guard Horse Back Strips for prolonged string life and EZ Lock Eyelets that make sure your tieoff knots dont slip Dynacore is also incorporated into the racquet for unmatched stability and torsion management Maintaining the same weight and balance at 116 oz this is a solid frame coupled with a significant headlight balance for the utmost in maneuverability An open 16x19 string pattern creates additional spin potential while a 98 sq in head size keep things controlled The 315 is one of Technifibres Tour Prepared models which translates to reduced vibration with higher quality assurance