The Dingerz Training Bat is a revolutionary bat that not only helps with coordination, but also strength. Dingerz bats have dense material in the core of the bat that shifts to the end of the bat as it is swung. The dynamic movement inside the bat greatly helps with forearm and wrist strength. Not only does it help with building up arm strength, it helps with a powerful follow through. So if you want to be more explosive through the baseball, the Dingerz Training Bat is perfect for any player of any age. The Dingerz bats come in an even ratio with the length, such as 32 inches 32 ounces.