This training bat is designed to be used after repetitions with the 1 HAND Trainers. Its three knob design helps the player to separate their top and bottom hand. This keeps each hand working independently.....while working together. This trainer helps to feel the throw of the bottom hand along with the push of the top hand. Improving knob and barrel control. The perfect intermediate step from one hand drills to BP with your bat. A must have tool for all true gamers.