DeMarini Vendetta  Senior Baseball Bat - 2009 Model Developed with the highest forming capabilities for thin walls along the largest aluminum sweet spot. The Rails technology in the handle is a hybrid which reinforces the frame for perimeter strength and stiffness SC4 alloy with thickness tuned technology. Structurally controlled with the highest forming capabilities to maximize sweet spot 12% stronger alloy Thickness tuned to exact physical properties to match bat and ball collision with different thickness rations to increase sweet spot The rails enable the interior handle to flex whilc reducing vibration, and also enlarge the sweet spot to generate ultimate bat speed. Thickness tuned aluminum precision controlled for maximum rebound force.