Increase your batting average! Basic body mechanics are crucial to developing a great swing. And the way you grip the bat and roll your wrist are key elements in executing those mechanics. The top Major League hitting coaches have been using the Flat-Bat for years to bring the best performance possible out of their players. The ATEC Pro Flat-Bat provides the instantaneous feedback you need in building the proper muscle memory to increase your batting average. Sizes & Weights: 31"(30oz.) • 32"(31oz.) • 33"(32"oz.)