Demarini Bustos Signature Model Bat (18-Pound, 31-Inch) FRC Handle - Fiber Reinforced Composite reduces vibration and hand sting giving more confidence on off-center hits Half+Half - The handle and barrel are performance matched to create optimum flex before impact and recoil with a burst of ball launching energy at impact DX1 Alloy - Delivers perfect balance of high KS strength and fracture toughness for a long lasting performance Rotation Index - Numerical system reminds players to rotate bat extending its life. 12 month limited warrenty