DeMarini 2014 Bustos WTDXBFP Fastpitch Softball Bat (-13) Fiber Reinforced Composite handles eliminate vibrations and hand sting Half & Half means the handle and barrel are performance matched to create optimum flex and recoil with a burst of ball launching energy at impact Hybrid comfort grip is a 2-piece grip built for ultimate comfort and tack DX1 Alloy delivers perfect balance of high KSI strength and fracture toughness for long lasting performance Rotation index is the numerical system that reminds players to rotate bat to extend its life