Miyazaki Kusala JDL Series Graphite Wood Shaft
The Miyazaki JDL series was engineered to have superior multi-axis consistency as the ultimate upgrade for the modern adjustable driver. Inconsistencies or "spines" present in inferior graphite shafts can lead to axes of enhanced or reduced stiffness. When an inconsistent shaft is rotated in an adjustable driver, differences in feel and preformance can negate or exaggerate precision adjustments. The JDL is Miyazaki's second-generation Quad Orthogonal Bias Technology design. By strategically orienting the origination and termination axes for each layer of carbon fiber, the spine effect is essentially eliminated.