Dynaswing Maple Wood Training bats Built to allow players to develop excellent timing and muscle memory through improved swing mechanics Provide a 3 prong benefit through their Dynamic Core Technology Dynamic Core Technology The bat has a reinforced aluminum core that contains the Dynamic Core Technology The aluminum center is filled with a dense, dynamic material that creates auditory triggers and momentum-assisting benefits Features: Made From Quality Maple Wood Material Reinforced Aluminum Core To Allow For Extended Durability Dynamic Core Tech (Starting Position) - Within The Aluminum Core; A Dense, Dynamic Material Falls To The Handle Of The Bat When Hands Are In A Proper Upright Position Before The Swing. Dynamic Core Tech (Swing) - As The Player Swings, The Material Travels To The End Of The Bat (Once Again Creating Auditory Feedback). This Forces The Hands Flat & Forward To Contact (Preventing Roll-Overs) Dynamic Core Tech (Follow Through) - The Momentum Created From The Material And Swing Pushes The Barrel Through The Zone To Allow For A Powerful Follow Through