PRODUCT TECHNOLOGY: POWER BOX: The box-shaped design effectively increases the stability and anti-torque can stand higher string tension. SEVEN SIX 76: The single-pass grommet hole construction creates less friction between strings this effectively reduces tension loss while extending string life. FRS: Based on the design of multi-layered carbon fiber the advanced Fiber Reinforced System (FRS) can not only improve the elasticity but also offer stable controllability with high tension string. CATAPULT STRUCTURE: CATAPULT STRUCTURE stores power and releases at smashing.