The box-shaped design effectively increases the stability and anti-torque, can stand higher string tension. 

The single-pass grommet hole construction creates less friction between strings, this effectively reduces tension loss, while extending string life.

Inspired by military helicopter, multi-layered structure made by carbon fiber and composites, minimize material size, reinforce handling feel and performance at a critical standard. 

Designed by computer simulation, FREE CORE is an innovative form of handles made using nano-nylon materials and molding techniques. It allows players to move more freely, swing smoother, and gives comfort to the hand.