Mattingly Sports V-Grip Ripped Fastpitch-12 Softball Bat Patented V-Grip technology MB5500 Atomic alloy for optimum strength and response Direct Power Transfer - stiff handle design for explosive energy transfer. Tru Balance weighting technology with huge sweet spot. Locked-N-Loaded End Plug II - maximizes trampoline effect. Approved for Little League Softball, ASA, USSSA, NSA Approved. 2 1/4" barrel diameter.