The Pro Bats One hand Trainer is a valuable tool helping you to improve your hitting stroke. Whether coaching, or striving to improve your own swing, the One Hand Trainer will make it easier to accomplish your goal. One hand training drills have been around for quite some time. The reason... they work. It is an excellent way teach a short, compact swing, allowing your hands to take the most efficient path to the ball. A short, compact, powerful swing is the goal of every hitter. Typically, the player or coach will modify a full size bat by cutting it down at the handle or choking up on it. Neither one of these solutions replicates the balance and feel of the bat you will use in a game. As a player and coach, I have always tried to replicate game situations as much as possible when trying to make improvements. Our One hand Trainer is made in four lengths (20", 22", 25", and 28") to accommodate hitters of all ages. These perfectly scaled down bats provide the balance and feel needed to successfully execute the variety of one handed drills used by players at all levels of baseball. Each bat is approximately a +2 weight ratio.