HEAD Graphene 360+ Radical 180 Players searching for power and maneuverability should take a long look at the HEAD Graphene 360+ Radical 180. Graphene 360+ technology combines energy transfer with innovative spiralfibers to create a clean feel at impact. Add more strength to each shot with HEAD's Inner Grommet System, which allows optimal stiffness in the racquet's throat. The HEAD Graphene 360+ Radical 180 is a lightweight weapon for serious players on the court. Racquet Technology PWRAIL technology: Advanced beam cross section in racquet's throat increases torsional stiffness to deliver impressive power and pinpoint control. Adaptive Fan Pattern (AFP): Allows you to customize your string pattern to match your game. Specially designed bumper guard lets you choose between the traditional 16 main pattern for power, control and durability, or a 12 main pattern for a softer feel. IGS™ Inner Grommet System: Eliminates the exterior grommet holes to deliver optimal stiffness without extra weight. Each tube is lined with friction-reducing polymer to allow the strings to slide through the tubes, resulting in maximum energy transfer and power on every shot. Graphene 360+: Combines HEAD's signature technology for stability and energy return with innovative spiralfibers that improve flexibility and feel.