DeMarini CF5 Insane Fastpitch Softball Bat (-10) Tri Strut TR3 Composite Barrel  Tri Strut TR3 Composite provides strength, stability and consistent performance through triangular formations at the molecular level. TR3 creates a very strong and responsive barrel without any unnecessary weight. Stacked Barrel Construction  Three independent walls create a dynamic springboard hitting surface giving you sweet spot with ball-popping trampoline effect. Tri Strut TR3 Handle Its the tightest/strongest composite DeMarini have developed. Gaining strength through triangular formations at the molecular level it efficiently transitions power from your hands to the barrel giving you balance and consistency. The CF5 Insane's performance is enhanced by the Geo End-cap which is comprised of triangular formations balancing the load and driving energy back into the barrel for maximum power. Great bat for college and high school players.