Wilson Demarini The One MLC Slowpitch Softball Bat 4.One Composite Barrel - Stiffer barrel for a one piece feel SC4 Alloy Handle - DeMarini's stiffest handle to date constructed with the strongest alloy manufactured by DeMarini Clutch End Cap - Synchronized stiffness with composite barrel returns impact energy to barrel Hybrid Performance Grip - 2 piece grip with thin performance feel and faded color grp. Rotation Index - Numerical system reminds players to rotate bat, extending its life.