StringKing Metal Pro Drop 11 Fastpitch Softball Power and performance. The StringKing Metal Pro fastpitch softball bat combines premium materials and superior manufacturing. It delivers a powerful aluminum alloy softball bat with consistent, long-lasting performance. Built to hold up over time. Certified and approved for use in fastpitch softball by USSSA, USA Softball, ISA, NSA, and WBSC. Balanced swing weight. Featuring a balanced swing weight that offers versatile performance for every player and level. More sweet spot, more contact. A large, consistent sweet spot gives you the best chance to make solid contact. Premium materials, lasting performance. High quality raw materials and maximum durability deliver long-lasting performance. Comfortable grip, confident swing. The taper, handle, and grip all work together for a comfortable, secure hold on every swing. Durability guaranteed. All backed by the fastest and easiest warranty in the game, for an entire year. Visit stringking.com/warranty for more information. Fastpitch softball certified. USSSA, USA Softabll, ISA, NSA and WBSC certified.