x14 alloy barrel: a massive alloy barrel designed specifically for elite power hitters; tracer end cap: composed of lightweight composite materials to enhance bat speed while maintaining powerful barrel performance.one-piece construction: allows for maximum stiffness, ultimate bat speed, and an ultra responsive feelfortified metal compound knob: manufactured with a reimagined combination of alloy and composite materials to enhance durability and allow for improved leverage.expanded warranty: demarini’s bbcor warranty covers multiple repairs or exchanges throughout the first year following the purchase of any stock or custom bat.