New 2008 Model Developed and used by top Collegiate Teams, DeMarini Stacked Composite Technology barrel, tuned to the new CRC composite flex tuned handle, combine to make the highest performing lightweight fastpitch softball bat approved for all association play, including ASA, NSA, and ISA. Stacked Composite Technology plus CRC composite handle equals the highest performing lightweight fastpitch bat approved for all Collegiate, High School, and major softball association play. The Half and Half technology is tuned to the Stacked composite barrel providing maximum performance and better feel. Available in key weight drops for youth travel ball play through collegiate play. The next generation of DoubleWall® optimizes multiple walls separated by the DeMarini® Power Ply for the biggest sweet spot and most power on off-center hits Flex Index 3.5 - The flex index shows a general scale of flexes available on bats. Typical all-aluminum bats flex less, giving the player a harsher feel & less performance on off-center hits. DeMarini Half & Half bats flex more (lower flex index) giving the player increased power, a better feel & more confidence on off-center hits. Half + Half - Silences feedback on off-center hits, allowing players to power through the ball with control & confidence. The two-piece system flexes before impact & recoils with a burst of ball-launching energy. Proprietary materials & design create the largest, most responsive sweetspot. Flex-Tuned Handle - Introduced in 2002, flex-tuned handles are an integral part of the Half & Half system. Far lighter than alloy, flex-tuned composite handles optimize bat balance, allowing players to swing faster with less effort. Flex-Tuned composite handles flex 2 to 4 times more than alloy handles, generating a natural whip in a players's swing for greater power. Clutch - Revolutionary 12 spoke knob & end cap designed to focus energy & return it back to the barrel. Rotation Index - The DeMarini Rotation Index helps players significantly prolong the life of DeMarini bats. A numerical index on the handle reminds players to incrementally rotate the bat after each hit, distributing wear around the entire barrel.