Unused ■ Swing Trainer Switching Master, Same Functionality Golf Training Aid Used by Many Famous Professionals ■ World's First Training Aid Specialized for the "Transition" Swing Training Aid, Swing Training Device Indoor Use Possible! ● Perfect for Creating Lag! ● Excellent for Core Strength in the Transition! Right-handed, Left-handed, and Lefty compatible Made overseas, same feel, same functionality. Please understand that this is a no-claims, no-returns item. No box. The world's first training aid specialized for the "transition." The design shifts the center of gravity of the object relative to the grip, teaching the correct hand output direction during the transition, and automatically "educating the hands." Just by clicking it, even those struggling with an early release can definitely master the coveted "lag."