The CamWood Trainer is the only baseball bat of its kind. This adult trainer has a 12oz knob-loaded design. The weight is located at the hands which helps keep them inside the ball and allows you to swing with proper mechanics. Many training bats (as well as traditional bat donuts) do not fully develop the necessary mechanics to create true power. They are often overloaded in the barrel, thus causing the casting effect and other mechanical breakdowns. This bat is perfectly balanced to strengthen the forearms and create a better hand path to the ball while improving bat speed and power. Primarily recommended for tee work, front toss, and on-deck, but can be used in all training facets - including live pitch. Practicing with CamWood Training Bats has proven success with professional teams as well as many high-schools and colleges. Sizing a bat is simple - a player should always train with the same length bat that he plays with. For example, if you hit with a 32-inch bat, then you should train with a 32-inch bat. The extra weight is distributed in such a way that it does not seem heavy. Think of holding a sledge hammer by the head rather than by the handle. The redistribution of weight makes it seem much lighter.