DeMarini Vendetta  Youth 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. The rails enable the interior handle to flex whilc reducing vibration, and also enlarge the sweet spot to generate ultimate bat speed. SC4 alloy with thickness tuned technology. Structurally controlled with the highest forming capabilities to maximize sweet spot with thinnest walls. Thickness tuned aluminum precision controlled for maximum rebound force. 12% stronger alloy Thickness tuned to exact physical properties to match bat and ball collision with different thickness rations to increase sweet spot